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I have added a standard, non administrator account to my Mac running Ventura 13.2

The new account can read files from an attached drive being used as a Time Machine and I would like to prevent this.

It looks like I have the capability to change permissions on folders within the backup but I would like to make all current and future backups inaccessible to the non-admin account. Only the admin account should be able to read the backup files.

Is this possible?

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    Each user should be able to see the same files they can access directly on the Mac, from their own account. Is this not sufficient? I think it would be very unwise to try changing permissions inside a Time Machine drive.
    – Tetsujin
    Feb 25 at 12:06
  • @Tetsujin That doesn't seem to be the case? I am able to see all the files of the administrator account in the backups from the non-administrator account.
    – mushroom
    Feb 27 at 2:16
  • Should be like this if you look into another account - i.stack.imgur.com/t4QoB.jpg
    – Tetsujin
    Feb 27 at 8:50
  • @Tetsujin you are correct. The permissions are wrong on some of my folders. I am surprised that the default permissions when running mkdir in the administrator account appears to enable read access for all users. Going to ask a separate question about fixing this.
    – mushroom
    Mar 3 at 2:13
  • apple.stackexchange.com/questions/456647/…
    – mushroom
    Mar 3 at 3:06

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