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Time Machine says: "Backup not encrypted"

I started a new Time Machine backup of my 2018 Mac mini which I recently upgraded to Catalina. I'm backing up two disks: the internal drive and an external drive (different from the Time Machine backup disk). Neither disk being backed up is encrypted (FileVault is off), so why does Time Machine put up this notification? No details are provided, so I don't even know to which disk the message refers.

Mac mini, macOS 10.15

Posted on Sep 26, 2020 2:30 PM

Best reply

Barney-15E

Level 10

113,422 points

Posted on Sep 26, 2020 6:42 PM

The 2018 Mini has a T2 chip. Every Mac with a T2 chip is encrypted even without FileVault.

The decryption key is stored in the T2 chip and it is automatically decrypted when you start it up.

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Time Machine says: "Backup not encrypted"

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