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I second this. Catalina runs great on my 15" mid-2015 16GB/1TB, and it even runs shockingly well (bootstrapped) on my (unsupported) 13" mid-2009 8GB/512GB.

The 2009-2015 era of Macbooks are, not were, truly phenomenal machines.

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Ugh i actually considered buying a 2015 mbp to replace my 2016 when it died for the last time THIS YEAR

What does bootstrapped mean? I’m surprised with Catalina running well on a 2009 MacBook. I felt it was slow on a Mac Mini 2014 where it is supported and went down one version.

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