Sierra update: caught in a loop

MacBook caught in a loop when updating to Sierra (V 10.12.6).


Click on Update; Restart Computer: "Available updates have changed" -


then back to Update. Caught in a loop.

Posted on Nov 14, 2022 5:44 PM

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Question marked as Top-ranking reply

Posted on Nov 14, 2022 6:21 PM

Start with this...


Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes or more.


Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

1 reply
Question marked as Top-ranking reply

Nov 14, 2022 6:21 PM in response to JTN1966

Start with this...


Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes or more.


Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

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Sierra update: caught in a loop

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