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オリジナル投稿者: Dan ,

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Your system maybe just fine!

Apple requires a full restart during the upgrade process a few times as the there is a firmware update as well as an OS update (I've had systems do four restarts to apply everything).

The other problem I've seen is a HD which has problems go into a tailspin of restarts as the firmware update is not able to complete. The only way to overcome this is to boot up under an external drive or use a second Mac system to fix if possible your drive using Disk Utility by putting your system in Target Mode. Otherwise you may need a new drive.

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