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Need help updating Mac

Need help updating

Updating what? From what version to what newer version, of what?

On what Mac?  Some model Macs maybe too old, so we need to know that as well

Apple menu -> About this Mac

10.14.2 (mid 2012)

MacBook Pro (mid 2012) 10.14.2

updating to what ?

最后更新：2017-09-26 02:35:01

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