Have you recently seen the subject matter “ The file ‘ % @ ’ could not be support up ” after Time Machine warned you of a nonstarter ? You ’re not alone : many people who have install themacOS 12 Monterey Public Betahave also received the same wrongdoing . There ’s no fix for it ; it ’s probable an error in how Time Machine read for file .

This may mean your files are not properly being back up , however . I insert Time Machine on a Mac that ’s running this public beta and looked around through older backups even where Time Machine claim it has n’t been updated . The files all seem to be there , but I ca n’t check comprehensively .

If you ’re concerned about losing information during this trial period before Apple squelch this bug in a future beta or production release of Monterey , check that all your document files are store on a syncing service , like iCloud Drive or Dropbox , or synchronize through iCloud services . It might be a adept time to make nightly knockoff of your computing machine withCarbon Copy Clonerand enable inCarbon Copy Cloner > Preferences > Updatesthe option “ Inform me of beta dismission . ”

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This failure appears related to a recent update to the macOS 12 Monterey public beta.

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