Access For Mac Database

‎Open Microsoft Access database on your Mac with this App, you can view data easily with Filter, Sort, Paging, and export data or schema to other databases. With the In-App Purchase feature 'Edit Data' and 'DB Creator' you can even edit it natively on your Mac, create new databases and new tables. Total size for an Access database (.accdb or.mdb), including all database objects and data. 2 gigabytes, minus the space needed for system objects. Note: You can work around this size limitation by linking to tables in other Access databases. You can link to tables in multiple database.

Being an Access database user you must have encountered issues while sharing Access database over network.

I know you must have tried every possible solution to resolve it soon but got nothing yet….!

Well, such issues regarding sharing Access database for multi-user access is severely encountered by many Access users.

Just have a look over one such user complaint.

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User Query:

I have an Access database that is currently configured to allow everyone opening it (and the parent folder) modify access, which I read was the required permission level in order to have multiple users with the file open at the same time.

However, the users keep coming up with an error that they “Cannot Open The File As It’s Already In Use”.

The database worked fine for years previously to now and no changes were made to their permissions structure or file configuration, so I’m a little bit confused as to what could be causing this or how to resolve. Everything I’ve read revolved around giving users modify permissions to the database file and the folder it resides in, which has already been done. If anyone has some insight that would be fantastic!

Thank you in advance!

Undoubtedly there are several ideas on how to share Access Database on network but this moreover depends on your needs and resource availability. This tutorial is about the options available to share Access DatabaseOver network and the benefits of each option.

Does Microsoft Access Allow Multiple Users?

By default, Access offers a multi-user platform and this functionality is built-in. To ensure data integrity and cause corruption multi-user database should split between front-end and back-end. Back-end gets stored on a network shared drive.

5 Ways To Share Access Database Over Network

Here are the methods that we will discuss one by one to share Access database on network for multi-user Access:

  • Share Data By Using Network Folders
  • Share a database by linking to SharePoint lists
  • Saving a database to a document library
  • Share Data On A SharePoint Site
  • Share Data By Using A Database Server

Method 1: Share Data By Using Network Folders

Share Data By Using Network Folders is the simplest option to share Access Database and has the least requirements. In this method database file is stored on a shared network drive and all users share the database file simultaneously.


Besides that, it has some limitations too, like reliability and availability. Mainly when multiple users modifying the data; since all database objects are shared. This sharing technique also diminishes the performance as all the database objects are sent across the network.


This method is workful if few people are expected to use the database at the same time and users don’t need to customize the design of the database.


This method is less secure because each user has a full copy of the database file, which increases the chances of unauthorized access.

Steps To Share A Database Using Network Folder:

  • First of all, check whether the Access is set to open in shared mode on all of the user’s PC. It’s a default setting so you must check it out. If the database is opened in Exclusive mode, then it will surely interfere with the data availability.
  • Now start access application and under File option from the menu click to the options button.
  • If you are an Access 2007 user then click to the Microsoft Office Button and then to the Access Options.
  • From the Access options box, click Client Settings.

Note: if you are an Access 2007 user then click to the Advanced option.

Access Database Manager For Mac

  • From the Advanced section, under Default open mode, select shared, click OK, and exit Access.
  • Now copy the database file to the shared folder. After copying the file, make sure that file attributes are set to allow read/write access to the database file. To use the database users must have read/write preference.
  • On all users’ PC, just make a shortcut to the database file. In the shortcut properties dialog, but the path of the database file in the Target property by using a UNC address instead of a mapped drive letter.

For example, instead of F:sample.accdb, use computernameshared.accdb.

Method 2: Share a database by linking to SharePoint lists:

Well Sharing a database by linking to SharePoint lists has the same benefits as that of split database and users can modify their own copy of the database as the data is shared via the SharePoint site.

Database software for mac os

As the data is in the SharePoint list, you can make it individually available over the network by using SharePoint features.

Here are the three main steps of this method:

  1. Shifting the data to SharePoint lists.
  2. Create links to those lists.
  3. Distribute the database file.

You need to use the Move to SharePoint Site Wizard to execute the first two steps and any means to accomplish the last steps:

Using the Export Tables to SharePoint Wizard

1. From the Database Tools tab, in the Move Data group, tap to the SharePoint option.


  • Well, this option is available in your database is been saved in .accdb file format.
  • For Access 2007 users, go to the external data tab, in the SharePoint Lists group, and tap to the Move to SharePoint.

2. Follow steps shown in Export tables to SharePoint wizard, specifying the location of your SharePoint site. To cancel the process tap to the Cancel.

3. From the last page of the wizard, make a selection for the Show Details check box to see further details about migration.

This wizard page informs you about which tables have been linked to lists and provide information about a backup location and URL for your database. It will also throw a warning if any migration issues encountered and give the location of the log table where you can see more detail about the issues.

  1. Click Finish when the wizard completes its actions.

If the wizard displays a warning, review the log table, and take necessary actions. For example, certain fields may not be moved or may be converted to another data type that is compatible with a SharePoint list.


In order to view your list on the SharePoint site, tap to the Lists on the Quick Launch, or hit View All Site Content. Just refresh the page in your web browser to make your lists appear on the quick launch on the SharePoint site. You can also make changes in the list settings on the SharePoint site.

Access For Mac Database

Method 3: Saving A Database To A Document Library

The third method is to save the database to a document library. This method is quite similar to saving a database a network folder and provide a convenient way to manage access to a database. As when you link to SharePoint lists, data is shared but not the database objects. Each individual user shares their own copy of the database.

  1. Open the Access Database which you need to share.
  2. From the File tab, click to the Save As option.
  3. Tap to the Save Database As, in the advanced section, select SharePoint and the tap to the Save As


For Access 2007 users: click Microsoft Office Button > Publish > Document Management Server.

For Access 2010 database user : click File > Save & Publish > Save Database As > SharePoint.

  1. From the opened Save to SharePoint dialog box, search for the document library that you want to use.
  2. Check out the database file name and type and do if any necessary changes you need to do it.
  3. At that tap to the Save.

Method 4: Share Data On A SharePoint Site

Here are some few ways to share Access database on SharePoint site:


Through the linking process, you can connect your data to another program. After this, you can see and edit your data from both SharePoint and Access. If in case you need not copy the SharePoint list into the MS Access database. But apart from that if you want to run queries and generate reports you can just link up your data.


While moving data from Access to SharePoint site, you need to make a list at the SharePoint site which remains linked to the tables of your database. In this task Export tables to SharePoint Wizard helps you to shift your data from the entire of your table and also to retain their relationships.

Method 5: Share Data By Using A Database Server

The last method is to share an access database on a network is by using a database server. For this, you need to use Access database with database server products like SQL Server. Though this procedure offers you so many benefits, it needs additional software i.e database server products such as SQL Server.

This step is very much similar to the splitting Access database. As in this method also Access tables are been saved over the network. And each of the users gets a local copy of the Access database file having links to tables, forms, queries, reports, and other database objects. Well, sharing procedures mostly depends on database server software you are using currently. Usually, this comprises of good data availability, selective access to the data, good integrated data management tools, etc.

It is seen that most of the database server software works flawlessly with the MS Access previous versions.

To catch more information, onhow to Migrate an Access database to SQL Server.


Now you must have got a clear idea of how to share Access Database for Multi-user access. So, try the mentioned solution carefully and do share your opinions with us in our comment section.

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Pearson Willey


Pearson Willey is a website content writer and long-form content planner. Besides this, he is also an avid reader. Thus he knows very well how to write an engaging content for readers. Writing is like a growing edge for him. He loves exploring his knowledge on MS Access & sharing tech blogs.

In computer security, mandatory access control (MAC) refers to a type of access control by which the operating system constrains the ability of a subject or initiator to access or generally perform some sort of operation on an object or target. In practice, a subject is usually a process or thread; objects are constructs such as files, directories, TCP/UDP ports, shared memory segments, IO devices, etc. Subjects and objects each have a set of security attributes. Whenever a subject attempts to access an object, an authorization rule enforced by the operating system kernel examines these security attributes and decides whether the access can take place. Any operation by any subject on any object is tested against the set of authorization rules (aka policy) to determine if the operation is allowed. A database management system, in its access control mechanism, can also apply mandatory access control; in this case, the objects are tables, views, procedures, etc.

With mandatory access control, this security policy is centrally controlled by a security policy administrator; users do not have the ability to override the policy and, for example, grant access to files that would otherwise be restricted. By contrast, discretionary access control (DAC), which also governs the ability of subjects to access objects, allows users the ability to make policy decisions and/or assign security attributes. (The traditional Unix system of users, groups, and read-write-execute permissions is an example of DAC.) MAC-enabled systems allow policy administrators to implement organization-wide security policies. Under MAC (and unlike DAC), users cannot override or modify this policy, either accidentally or intentionally. This allows security administrators to define a central policy that is guaranteed (in principle) to be enforced for all users.

Historically and traditionally, MAC has been closely associated with multilevel security (MLS) and specialized military systems. In this context, MAC implies a high degree of rigor to satisfy the constraints of MLS systems. More recently, however, MAC has deviated out of the MLS niche and has started to become more mainstream. The more recent MAC implementations, such as SELinux and AppArmor for Linux and Mandatory Integrity Control for Windows, allow administrators to focus on issues such as network attacks and malware without the rigor or constraints of MLS.

Historical background and implications for multilevel security[edit]

Historically, MAC was strongly associated with multilevel security (MLS) as a means of protecting US classified information. The Trusted Computer System Evaluation Criteria (TCSEC), the seminal work on the subject, provided the original definition of MAC as 'a means of restricting access to objects based on the sensitivity (as represented by a label) of the information contained in the objects and the formal authorization (i.e., clearance) of subjects to access information of such sensitivity'[1]. Early implementations of MAC such as Honeywell's SCOMP, USAF SACDIN, NSA Blacker, and Boeing's MLS LAN focused on MLS to protect military-oriented security classification levels with robust enforcement.

The term mandatory in MAC has acquired a special meaning derived from its use with military systems. In this context, MAC implies an extremely high degree of robustness that assures that the control mechanisms can resist any type of subversion, thereby enabling them to enforce access controls that are mandated by order of a government such as the Executive Order 12958 for US classified information. Enforcement is supposed to be more imperative than for commercial applications. This precludes enforcement by best-effort mechanisms; only mechanisms that can provide absolute or near-absolute enforcement of the mandate are acceptable for MAC. This is a tall order and sometimes assumed unrealistic by those unfamiliar with high assurance strategies, and very difficult for those who are.



In some systems, users have the authority to decide whether to grant access to any other user. To allow that, all users have clearances for all data. This is not necessarily true of a MLS system. If individuals or processes exist that may be denied access to any of the data in the system environment, then the system must be trusted to enforce MAC. Since there can be various levels of data classification and user clearances, this implies a quantified scale for robustness. For example, more robustness is indicated for system environments containing classified Top Secret information and uncleared users than for one with Secret information and users cleared to at least Confidential. To promote consistency and eliminate subjectivity in degrees of robustness, an extensive scientific analysis and risk assessment of the topic produced a landmark benchmark standardization quantifying security robustness capabilities of systems and mapping them to the degrees of trust warranted for various security environments. The result was documented in CSC-STD-004-85.[2] Two relatively independent components of robustness were defined: Assurance Level and Functionality. Both were specified with a degree of precision that warranted significant confidence in certifications based on these criteria.

Microsoft Access Database For Mac


The Common Criteria[3] is based on this science and it intended to preserve the Assurance Level as EAL levels and the functionality specifications as Protection Profiles. Of these two essential components of objective robustness benchmarks, only EAL levels were faithfully preserved. In one case, TCSEC level C2[4] (not a MAC capable category) was fairly faithfully preserved in the Common Criteria, as the Controlled Access Protection Profile (CAPP).[5]Multilevel security (MLS) Protection Profiles (such as MLSOSPP similar to B2)[6] is more general than B2. They are pursuant to MLS, but lack the detailed implementation requirements of their Orange Book predecessors, focusing more on objectives. This gives certifiers more subjective flexibility in deciding whether the evaluated product’s technical features adequately achieve the objective, potentially eroding consistency of evaluated products and making it easier to attain certification for less trustworthy products. For these reasons, the importance of the technical details of the Protection Profile is critical to determining the suitability of a product.

Such an architecture prevents an authenticated user or process at a specific classification or trust-level from accessing information, processes, or devices in a different level. This provides a containment mechanism of users and processes, both known and unknown (an unknown program (for example) might comprise an untrusted application where the system should monitor and/or control accesses to devices and files).


A few MAC implementations, such as Unisys' Blacker project, were certified robust enough to separate Top Secret from Unclassified late in the last millennium. Their underlying technology became obsolete and they were not refreshed. Today there are no current implementations certified by TCSEC to that level of robust implementation. However, some less robust products exist.

  • Amon Ott's RSBAC (Rule Set Based Access Control) provides a framework for Linux kernels that allows several different security policy / decision modules. One of the models implemented is Mandatory Access Control model. A general goal of RSBAC design was to try to reach (obsolete) Orange Book (TCSEC) B1 level. The model of mandatory access control used in RSBAC is mostly the same as in Unix System V/MLS, Version 1.2.1 (developed in 1989 by the National Computer Security Center of the USA with classification B1/TCSEC). RSBAC requires a set of patches to the stock kernel, which are maintained quite well by the project owner.
  • An NSA research project called SELinux added a Mandatory Access Control architecture to the Linux Kernel, which was merged into the mainline version of Linux in August 2003. It utilizes a Linux 2.6 kernel feature called LSM (Linux Security Modules interface). Red Hat Enterprise Linux version 4 (and later versions) come with an SELinux-enabled kernel. Although SELinux is capable of restricting all processes in the system, the default targeted policy in RHEL confines the most vulnerable programs from the unconfined domain in which all other programs run. RHEL 5 ships 2 other binary policy types: strict, which attempts to implement least privilege, and MLS, which is based on strict and adds MLS labels. RHEL 5 contains additional MLS enhancements and received 2 LSPP/RBACPP/CAPP/EAL4+ certifications in June 2007.[7]
  • TOMOYO Linux is a lightweight MAC implementation for Linux and Embedded Linux, developed by NTT Data Corporation. It has been merged in Linux Kernel mainline version 2.6.30 in June 2009.[8] Differently from the label-based approach used by SELinux, TOMOYO Linux performs a pathname-basedMandatory Access Control, separating security domains according to process invocation history, which describes the system behavior. Policy are described in terms of pathnames. A security domain is simply defined by a process call chain, and represented by a string. There are 4 modes: disabled, learning, permissive, enforcing. Administrators can assign different modes for different domains. TOMOYO Linux introduced the 'learning' mode, in which the accesses occurred in the kernel are automatically analyzed and stored to generate MAC policy: this mode could then be the first step of policy writing, making it easy to customize later.
  • SUSE Linux and Ubuntu 7.10 have added a MAC implementation called AppArmor. AppArmor utilizes a Linux 2.6 kernel feature called LSM (Linux Security Modules interface). LSM provides a kernel API that allows modules of kernel code to govern ACL (DAC ACL, access control lists). AppArmor is not capable of restricting all programs and is optionally in the Linux kernel as of version 2.6.36.[9]
  • Linux and many other Unix distributions have MAC for CPU (multi-ring), disk, and memory; while OS software may not manage privileges well, Linux became famous during the 1990s as being more secure and far more stable than non-Unix alternatives. Linux distributors disable MAC to being at best DAC for some devices – although this is true for any consumer electronics available today.
  • grsecurity is a patch for the Linux kernel providing a MAC implementation (precisely, it is an RBAC implementation). grsecurity is not implemented via the LSM API.[10]
  • Microsoft Starting with Windows Vista and Server 2008 Windows incorporates Mandatory Integrity Control, which adds Integrity Levels (IL) to processes running in a login session. MIC restricts the access permissions of applications that are running under the same user account and which may be less trustworthy. Five integrity levels are defined: Low, Medium, High, System, and Trusted Installer.[11] Processes started by a regular user gain a Medium IL; elevated processes have High IL.[12] While processes inherit the integrity level of the process that spawned it, the integrity level can be customized on a per-process basis: e.g. IE7 and downloaded executables run with Low IL. Windows controls access to objects based on ILs, as well as for defining the boundary for window messages via User Interface Privilege Isolation. Named objects, including files, registry keys or other processes and threads, have an entry in the ACL governing access to them that defines the minimum IL of the process that can use the object. MIC enforces that a process can write to or delete an object only when its IL is equal to or higher than the object’s IL. Furthermore, to prevent access to sensitive data in memory, processes can’t open processes with a higher IL for read access.[13]
  • FreeBSD supports Mandatory Access Control, implemented as part of the TrustedBSD project. It was introduced in FreeBSD 5.0. Since FreeBSD 7.2, MAC support is enabled by default. The framework is extensible; various MAC modules implement policies such as Biba and multilevel security.
  • Sun's Trusted Solaris uses a mandatory and system-enforced access control mechanism (MAC), where clearances and labels are used to enforce a security policy. However note that the capability to manage labels does not imply the kernel strength to operate in multilevel security mode[citation needed]. Access to the labels and control mechanisms are not[citation needed] robustly protected from corruption in protected domain maintained by a kernel. The applications a user runs are combined with the security label at which the user works in the session. Access to information, programs and devices are only weakly controlled[citation needed].
  • Apple's Mac OS X MAC framework is an implementation of the TrustedBSD MAC framework.[14] A limited high-level sandboxing interface is provided by the command-line function sandbox_init. See the sandbox_init manual page for documentation.[15]
  • Oracle Label Security is an implementation of mandatory access control in the Oracle DBMS.
  • SE-PostgreSQL is a work in progress as of 2008-01-27,[16][17] providing integration into SE-Linux. It aims for integration into version 8.4, together with row-level restrictions.
  • Trusted RUBIX is a mandatory access control enforcing DBMS that fully integrates with SE-Linux to restrict access to all database objects.[18]
  • Astra Linux OS developed for Russian Army has its own mandatory access control.[19]
  • Smack (Simplified Mandatory Access Control Kernel) is a Linux kernelsecurity module that protects data and process interaction from malicious manipulation using a set of custom mandatory access control rules, with simplicity as its main design goal.[20] It has been officially merged since the Linux 2.6.25 release.[21]
  • ZeroMAC written by Peter Gabor Gyulay is a Linux LSM kernel patch. [22]

See also[edit]

  • Attribute-based access control (ABAC)
  • Context-based access control (CBAC)
  • Discretionary access control (DAC)
  • Lattice-based access control (LBAC)
  • Organisation-based access control (OrBAC)
  • Role-based access control (RBAC)


  1. ^
  2. ^'Technical Rational Behind CSC-STD-003-85: Computer Security Requirements'. 1985-06-25. Archived from the original on July 15, 2007. Retrieved 2008-03-15.
  3. ^'The Common Criteria Portal'. Archived from the original on 2006-07-18. Retrieved 2008-03-15.
  4. ^US Department of Defense (December 1985). 'DoD 5200.28-STD: Trusted Computer System Evaluation Criteria'. Retrieved 2008-03-15.
  5. ^'Controlled Access Protection Profile, Version 1.d'. National Security Agency. 1999-10-08. Archived from the original on 2012-02-07. Retrieved 2008-03-15.
  6. ^'Protection Profile for Multi-Level Operating Systems in Environments Requiring Medium Robustness, Version 1.22'(PDF). National Security Agency. 2001-05-23. Retrieved 2018-10-06.
  7. ^National Information Assurance Partnership. 'The Common Criteria Evaluation and Validation Scheme Validated Products List'. Archived from the original on 2008-03-14. Retrieved 2008-03-15.
  8. ^'TOMOYO Linux, an alternative Mandatory Access Control'. Linux 2 6 30. Linux Kernel Newbies.
  9. ^'Linux 2.6.36 released 20 October 2010'. Linux 2.6.36. Linux Kernel Newbies.
  10. ^'Why doesn't grsecurity use LSM?'.
  11. ^Matthew Conover. 'Analysis of the Windows Vista Security Model'. Symantec Corporation. Archived from the original on 2008-03-25. Retrieved 2007-10-08.
  12. ^Steve Riley. 'Mandatory Integrity Control in Windows Vista'. Retrieved 2007-10-08.
  13. ^Mark Russinovich. 'PsExec, User Account Control and Security Boundaries'. Retrieved 2007-10-08.
  14. ^TrustedBSD Project. 'TrustedBSD Mandatory Access Control (MAC) Framework'. Retrieved 2008-03-15.
  15. ^'sandbox_init(3) man page'. 2007-07-07. Retrieved 2008-03-15.
  16. ^'SEPostgreSQL-patch'.
  17. ^'Security Enhanced PostgreSQL'.
  18. ^'Trusted RUBIX'. Archived from the original on 2008-11-21. Retrieved 2020-03-23.
  19. ^(in Russian)Ключевые особенности Astra Linux Special Edition по реализации требований безопасности информацииArchived 2014-07-16 at the Wayback Machine
  20. ^'Official SMACK documentation from the Linux source tree'. Archived from the original on 2013-05-01.
  21. ^Jonathan Corbet. 'More stuff for 2.6.25'. Archived from the original on 2012-11-02.
  22. ^''.


Mac Database Client

  • P. A. Loscocco, S. D. Smalley, P. A. Muckelbauer, R. C. Taylor, S. J. Turner, and J. F. Farrell. The Inevitability of Failure: The Flawed Assumption of Security in Modern Computing Environments. In Proceedings of the 21st National Information Systems Security Conference, pages 303–314, Oct. 1998.
  • P. A. Loscocco, S. D. Smalley, Meeting Critical Security Objectives with Security-Enhanced Linux Proceedings of the 2001 Ottawa Linux Symposium.
  • ISO/IEC DIS 10181-3, Information Technology, OSI Security Model, Security FrameWorks, Part 3: Access Control, 1993
  • Robert N. M. Watson. 'A decade of OS access-control extensibility'. Commun. ACM 56, 2 (February 2013), 52–63.

External links[edit]

  • Weblog post on the how virtualization can be used to implement Mandatory Access Control.
  • Weblog post from a Microsoft employee detailing Mandatory Integrity Control and how it differs from MAC implementations.
  • GWV Formal Security Policy Model A Separation Kernel Formal Security Policy, David Greve, Matthew Wilding, and W. Mark Vanfleet.
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