I've been happily using my 2015 MBP on Mojave for a few years now, it works great, and I also have bootcamp install with Win 10 for some car stuff. I've tried Monterey which is the last officially suported macOS for my MBP, but it is noticeably slower than Mojave, fans ramp up all the time, and battery life suffered massively. And yes, I did give it a week to make sure everything is nice and settled, it just seems very unoptimized.
On the other hand, I've been using Sonoma on my desktop hackintosh and really enjoy it as an OS, so I'd like to give it a shot on my MBP as well, however, I don't want to mess up my Mojave and Windows dual-boot config.
My question is, can I create a new volume in Mojave, install Monterey on it using the recovery, then install Sonoma using OCLP on that new volume, without affecting the Mojave and Win 10 installs? Will I be able to boot directly into Mojave and Win 10 from the OCLP boot menu? If I don't like how Sonoma works, how should I proceed to reverting back to the native Apple bootloader and not break everything?
I found a couple of other Reddit posts and one guy suggests that I can directly install OpenCore on the internal EFI (in my case that would be on my Monterey volume I believe), boot into Monterey using OCLP, and then install Sonoma OTA. Would that really work?
Asking this because I don't have a flash drive at hand, I'm at my parents' countryside house dog-sitting for a couple of days and apparently I am bored, and feel like experimenting.
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