I have a 2006 Mac Pro with a 32bit efi. Apple released an, I think, 8800GT gpu in the 2008 model and explicitly prevented it from being used in the 2006 mac. I

I have a 2006 Mac Pro with a 32bit efi. Apple released an, I think, 8800GT gpu in the 2008 model and explicitly prevented it from being used in the 2006 mac. I don't remember exactly when, but I think by 2010 the 2006 Mac Pro was EOL and "couldn't run" the next major version of OSX. I think they blamed the 32bit EFI. There was a fairly easy workaround for this so I was able to keep installing updates for quite some time. The old macbooks with the coreDuo CPUs, only lasted a few years before a next major osx release dropped 32bit cpu support. I have a 2011 15" macbook pro that Apple ended the life of around 2015 or 2016, I believe, by discontinuing the GPU drivers in next major osx release. How many releases do you think before x86 is dropped completely from OSX?