Files have custom access after Time Machine migration to Mac mini

I recently bought a new Mini Mac (M4) Tahoe 26.6.2 and transferred files to it from an old Mac via a Time Machine Back Up. All seemed fine, but folders and basic documents such as pages and numbers files that I need to work on only have 'custom access' in the 'sharing and permissions' so short of copying and pasting everything into new documents it is all useless to me. How can I change this ?

Mac mini, macOS 10.15

Posted on Sep 8, 2026 6:47 AM

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17 replies

Sep 10, 2026 4:56 AM in response to NickE50

If you mean that you set up an account on the new machine with the same account name as the one on the old machine before you did the transfer then that might be the cause of the problem. The Mac doesn't use the name to identify the account, it uses a user id (UID). Accounts with the same name can have different IDs.


You can check if your accounts have the same UID on both Macs by using Terminal command "id".

Sep 12, 2026 7:25 AM in response to NickE50

NickE50 wrote:
Both User accounts have the same ID. So the hunt for a solution goes on !

The problem is that you are cherry picking from the other Mac's Time Machine backup. When you should have Migrated from the old Mac or it's Time Machine during the initial Mac mini setup.


How long have you had the new Mac mini....?

One solution, is to erase the new Mac mini and then do a proper migration.

Transfer to a new Mac with Migration Assistant - Apple Support

The other solution, is to setup File Sharing between the two accounts.

Share files with others who use your Mac - Apple Support

Sep 8, 2026 8:00 AM in response to NickE50

If you migrated to the new Mac mini during the initial setup using your same User Account...?

Then everything should be contained with-in that one Users Account.

Transfer to a new Mac with Migration Assistant - Apple Support


If you setup the new Mac mini first using a different Account and then migrated your old User Account ...?

You will end up with two different User Accounts that can only Share data.

Share files with others who use your Mac – Apple Support


At this point you have 2 options if you have two User Accounts.

1) Wipe the new Mac mini and Migrate your old User during the setup.

2) Continue to live with Sharing User files between the two User Accounts.

Sep 12, 2026 9:08 AM in response to NickE50

Migration from the old Mac or it's Time Machine backup is general not a problem.

The problem is that you did not migrate during the initial setup of the new Mac mini.


Instead of e-mailing the files, you can also setup network File Sharing between the two Mac's.

Then use that to access and move the files from the old Mac to the new Mac.

Set up file sharing on Mac - Apple Support


Additionally If you want to cherry-pick the file from Time Machine backups..?

You will need to do that while logged into the old Mac account, then internally share the files with the new account.

Sep 9, 2026 12:23 AM in response to OldToad

Thanks for your suggestion. Yes I have tried to change each folder, however, whilst the ‘info’ tells me that I have read and write permissions, the sharing permissions only gives ‘custom access’ and I cannot change this on any of the folders. The result is that I cannot edit any of the documents in the folders or duplicate them.

Sep 9, 2026 8:41 AM in response to den.thed

Lots unfortunately !

If I open one I can’t change its name or move it to another folder. Nor can I duplicate it.

I can copy the contents, open a new file and the paste in what I have copied. The new file then gives me the view and edit permissions that the old one claimed that I had. That’s Ok for a Pages doc, but a real pain for a multi-sheet numbers doc.

Sep 10, 2026 4:16 AM in response to HWTech

I used this procedure from Apple Support :

Recover files using Time Machine and Spotlight on Mac

If you use Time Machine to back up your Mac, you can use Spotlight to initiate a search of Time Machine to recover lost or deleted items.

Note: In apps that let you create and save documents, such as TextEdit and Preview, you can also retrieve earlier versions of documents from within the app. See View and restore past versions of documents.


  1. On your Mac, open a Finder window, then type a search word or phrase in the search field in the upper-right corner.
  2. Refine the results by specifying search criteria using the search bar.
  3. Click  in the menu bar, then choose “Browse Time Machine backups”.
  4. If the Time Machine icon isn’t in the menu bar, choose Apple menu  > System Settings. Click Control Centre  in the sidebar, scroll down to Time Machine , then select “Show in Menu Bar” from the pop-up menu.
  5. Use the arrows and timeline to browse the Time Machine backups.
  6. Select one or more items you want to restore (these can include folders or your entire disk), then click Restore.


There certainly seems to be no solution to the problem of changing the Sharing and Permissions entry from 'Custom access'

Files have custom access after Time Machine migration to Mac mini

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