Networking
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When using network shares, change default permissions from normal (left) to give the group read and write access.
Set permissions for sharing
Q
We share files between our Macs using sparse bundles on our NAS, but when anyone creates new files or folders their permissions have to be changed manually to allow others to write to them. How can we make that easier?
by TODD BROOKS
A
Default permissions set for all new files and folders created by a user are governed by their Mac’s umask. Its standard setting in macOS is to give that user read and write access, and their group and everyone read-only access. To change that to give their group read and write access, you need to change the default umask for that Mac. Before doing so, check there’s a folder at /private/var/db/com.apple.xpc.launchd/config, and if there isn’t, create one to contain the custom umask. umasks use a three-digit octal number that’s subtracted from fully open permissions, also expressed in octal notation. Fully open files have octal permissions of 666, and 777 for folders. The default umask is 022, which results in file permissions of 644 and folder permissions of 755. To give all users in the same group read-write access, you need to change those to 664 and 775 respectively, which you can do with a umask of 002 rather than the default of 022.