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I could continue with El Capitan, but Sierra has many fixes to bugs I'm currently living with, plus improvements to many Apple apps that I would like to enjoy. It has run for years and is still very fast (especially with its new SSD drives). It's just that, damn it, I'm attached this old tower. I have a MacBook Air and I could afford to buy a new Mac. ROM? According to the MacTracker app, my tower has a Intel Xeon 5400 series ("Harpertown") processor.

Is there another way to go about this? What does the Sierra installer check to know whether the machine is supported? If I were to find a way around this, is there some hardware-related reason why Sierra wouldn't run on this machine? E.g. Please switch to XPC or bootstrap_check_in(): Įven after exchanging emails with DosDude, we weren't able to resolve the problem. However, the installer disk it creates hangs during boot with the error: Can't get kexts port.Ĭom.489 Warning: Endpoint has been activated through legacy launch(3) APIs. I have tried the Sierra patch tool from DosDude. I know it is not supported, but as the machine itself is no longer supported by Apple, I don't really care. I have tried the Sierra patch tool from DosDude. I would just like to install Sierra on my unsupported Mac Pro Tower early 2008. I would just like to install Sierra on my unsupported Mac Pro Tower early 2008.