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  1. Cake9437

    Great old MBP, Hesitant to upgrade OS, cheap Chinese motherboard installed, advice?

    Hey, this is my first post on the site, nice to meet you all. Please help me determine if I can upgrade my OS, to what level I should, and if doing so will fix my problem. I got an excellent macbook pro 8 years ago, but that was 8 years ago. Originally it had 10.9 Mavericks on it and it was...