#Mac os version for 2012 macbook pro mac os x
Your MBP won't run Big Sur, so you're already falling into 'legacy' territory. Question: Q: MacBook Pro running Mac OS X Yosemite version 10.10.5 and need to get to 10.11 More Less Apple Footer This site contains user submitted content, comments and opinions and is for informational purposes only. The 'best' OS is the one that lets you run the apps that you need, while supporting your hardware. And unless you have previously downloaded a copy of an older operating system, then Sierra is the next upgrade available to you. Test booting into Safe Boot Mode (hold down shift at boot), or running in a brand new user account that doesn't have all the Login Items and Launch Agents of your existing account. A MacBook Pro 15' Mid-2012 came with Lion 10.7.3, and that is the OLDEST operating system version it will run.
For all Macs that are compatible with a specifc maximum supported version of Mac OS X - courtesy of 's Ultimate Mac Sort - click the OS of interest. For complete specs on a particular system, click the name of the Mac. Or it could be that the slowness is caused by software: things you've installed, possibly for a previous OS, that now don't play well on Catalina. The maximum version of Mac OS X, OS X, or macOS supported by each G3 and later Mac follows. If you haven't already maxed it to 16 GB, do so. Not enough RAM could also be a factor (combined with swapping onto slow storage media). (If you've already done that, then make sure the SSD has at least 20% free space.) If you still have the original hard drive, then that's the likeliest cause of slowness, and it should be replaced by an SSD - to improve reliability, if nothing else. (Indeed, one of the reasons they cut off older Macs is because the new OS doesn't run well.)
If Apple says an OS will run on that Mac, that means it should run fine. Your question is based on the premise that it is the OS that is causing the slowness.
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