When you first create a share point, Mac OS X Lion Server assigns it standard POSIX permissions for Owner, Group, and Others. You can change the owner and group, change the permissions for all three entities, and add users. Standard POSIX permissions are easier to set than ACLs and may be all that you need.
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For share points shared with AFP and/or SMB, you can also add permissions with an access control list (ACL) for a finer degree of access control. An ACL is the server’s list of all permissions for all users and groups and for a share point. You add names of users and groups to the list and then use pop-up menus to assign permissions.
ACLs are more complicated than POSIX permissions because they give you up to 17 choices: 13 permissions grouped by type, as well as 4 types of inheritance.
With almost 100,000 possible combinations of ACL permissions, it’s best to set permissions for groups and add user permissions only for exceptions.
These ACL permissions settings are well hidden in the Server app. Here’s how to access them in the Server app:
Administrative users: Although a complete discussion of the special permissions that a user with administrator permissions has on a Mac running Mac OS X is very complex, note two important things: The first user created (usually when you install OS X for the first time) is automatically granted administrator (Admin) powers. Jan 05, 2014 Assistive Devices and Assistive Apps are applications and accessories which can control parts of the Mac and MacOS beyond the normal scope of app limits. While it’s primarily thought of as an Accessibility feature, it’s also commonly uses for general apps too, ranging from screen sharing functions, to apps that require microphone access, to. Mar 15, 2017 By default, Mac apps are self-contained, and can’t change the way you interact with the system or other applications. This is a very good thing. It prevents sketchy things from happening, like games you’ve downloaded logging your keystrokes or malware clicking buttons in your browser. And TeamViewer users connecting to macOS 10.15 or higher will additionally only be able to view the desktop background and the TeamViewer app, but not any other applications at all. These additional permissions must be granted locally on the Mac and some of them require admin rights.
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1Click the name of your server.
You will find it in the sidebar under Hardware.
2Click the Storage tab.
Browse for and select a shared folder.
3Click the gear icon and select Edit Permissions from the pop-up menu.
A list of users and groups appears.
4If you want to add a user or group, click the Add (+) button.
Type the name of an existing user or group.
5To configure permissions, click the triangle to the left of the user or group name.
This exposes the first level of ACL permissions. You have four choices: Administration, Read, Write, and Inheritance. You can make choices here. A hyphen [–] in a check box means that some, but not all, of the subordinate items for that category are selected. Selecting or deselecting a check box selects or deselects all of the subordinate items.
6(Optional) Click the triangles next to the choices to expand them.
This will let you go even deeper into ACL permissions. Make any changes that you need and click ok when done.
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An application is a type of file that you can share. If you do, set permissions so that very few people can change permissions for shared applications. In the ACLs, under Administration, few people should have the Change Permissions and Change Owner permissions. Malware such as viruses often targets permissions in applications.
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Macintosh file sharing (and indeed, Mac OS X Lion as well) is based on the concept of users. You can share items with no users, one user, or many users, depending on your needs and what you tell your Mac about who is allowed to see and access specific folders.
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Users: People who share folders and drives (or your Mac) are users. A user’s access to items on your local hard drive is entirely at your discretion.
When you first set up your Mac, you created your first user. This user automatically has administrative powers, such as adding more users, changing preferences, and having the clearance to see all folders on the hard drive.
Administrative users: Although a complete discussion of the special permissions that a user with administrator permissions has on a Mac running Mac OS X is very complex, note two important things:
The first user created (usually when you install OS X for the first time) is automatically granted administrator (Admin) powers.
Only an administrator account can create new users, delete some (but not all) files from folders that aren’t in his or her Home folder, lock and unlock System Preferences panes, and a bunch of other stuff. If you try something and it doesn’t work, make sure you’re logged in as an Administrator or can provide an Administrator username and password when prompted.
You can give any user administrator permissions by selecting that user’s account in the Users & Groups System Preferences pane and then selecting the Allow User to Administer This Computer check box. You can set this check box when you’re creating the user account or do it later, if that works for you.
Groups: Groups are Unix-level designations for privilege consolidation. A user can be a member of multiple groups.
Guests: Two kinds of guests exist. The first kind lets your friends log into your Mac while sitting at your desk without user accounts or passwords. When they log out, all information and files in the guest account’s Home folder are deleted automatically.
If you want this kind of guest account, you need to enable the Guest Account in the Users & Groups System Preferences pane. To do so, click the Guest Account in the list of accounts on the left and then select the Allow Guests to Log In to This Computer check box.
The second kind of guest is people who access Public folders on your Mac via file sharing over your local area network or the Internet. They don’t need usernames or passwords. You don’t have to do anything to enable this type of guest account.