Hello MacPro early 2008 here, running Mac OS X Lion, Mavericks, Yosemite, El Capitan too. All versions of OS X on this machine run quick and smooth, so no problems here. El Capitan is the last version of OS X that is compatible with the old slugger. Hello MacPro early 2008 here, running Mac OS X Lion, Mavericks, Yosemite, El Capitan too. All versions of OS X on this machine run quick and smooth, so no problems here. El Capitan is the last version of OS X that is compatible with the old slugger. So we need to find out what might be causing the slow performance on your Mac Pro.
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If you try to start up your Mac from a hard disk, network volume, or Time Machine backup that contains an incompatible version or build of macOS, you might experience one or more of these symptoms:
- Your Mac doesn't finish starting up, or displays a prohibitory symbol at startup.
- You see a message that you're using an unsupported or incorrect version of the Mac operating system.
- Your Mac doesn't respond to your trackpad, mouse, or keyboard.
- Apps unexpectedly quit.
- Your Mac doesn't sleep or wake.
- You don't hear any sound from your Mac.
- The fans in your Mac are louder, because they're spinning faster.
- The image on your display appears to shrink, has black bars around it, or appears tinted.
- You can't use Bluetooth or Wi-Fi.
Which Mac operating systems are compatible?
The version of macOS that came with your Mac is the earliest version compatible with that Mac. To find out whether your Mac is compatible with a later version of macOS, check the system requirements:
![Pro Pro](/uploads/1/2/6/0/126050140/103845095.jpg)
Best image background remover for mac. If your Mac won't start up from a compatible version of macOS, it might require a specific build of that version. To get the correct build:
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- Use macOS Recovery to reinstall macOS from the affected Mac.
- Or upgrade to a later version of macOS.
Learn more
Apple Mac Pro
- To restore a Time Machine backup that was created on a different Mac, use Migration Assistant.