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Model A1225 / Early 2009 / 2.66, 2.93, or 3.06 GHz Core 2 Duo processor

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How to install High Sierra after cpu upgrade

How do I install High Sierra in my iMac 7.1 after upgrading cpu to T9500?

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You can find instructions on how to install macOS here. You may need to install an earlier OS first and then upgrade to High Sierra. Good luck!

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Henry Cornelison crwdns2934231:0crwdne2934231:0
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