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standfast

macrumors newbie
Original poster
Aug 6, 2023
2
2
Hi everyone. I hope I'm posting this in the right forum but happy to be corrected if not!

I have an old early 2008 pre-unibody 15" MBP (2.4 C2D, 4GB, 750 GB SATA) which I had used for several years running DosDude1's patched version of Catalina. I never used the laptop for anything particularly demanding, just office work, emails, web browsing etc and I found it was perfectly usable for that sort of work. However, I eventually took it up as far as 12.6.4 Monterey and although it runs without issue and doesn't ever crash/panic, it is noticeably more sluggish than Catalina.

In the end I decided after 15 years it was time to throw in the towel and bought a new Macbook. But I'd quite like to keep this old machine as a backup as it is in good condition with plenty of life left in it.

I would like to downgrade it back to Catalina if possible. Do any of you guys know if that would be as simple as installing DosDude's patched Catalina from a USB in the usual fashion? Or will that cause issues with the OCLP boot loader that is now installed on the HD? I don't have an issue with wiping the HD but I don't want to brick it by corrupting the bootloader or something by trying to install DosDude's patched Catalina over OCLP.

Any guidance would be very much appreciated! Thank you!
 
For anyone wondering, I decided to give it a go anyway. I created a new USB installer on my iMac in the usual fashion and installed as normal and it worked great.

Obviously you have to wipe the HD with the Monterey (or any newer OS) installation on, but aside from that all good!
 
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