Hi all, Silent lurker here, have been around here for several years already I think but this is my first post. My mbp from 2007 has been working just fine with El Capitan until a couple of weeks ago. It started to misbehave and throwing lots of kernel panics / hangs at boot and so on. A non official apple service here had a look to it and they say the cpu went to hell. They can still replace it but I was wondering : how about actually installing a more modern cpu that has sse4 in order to be able to run Sierra ? Would the macOS installer actually recognize that even if the laptop is older it has a more modern cpu ? I haven’t asked yet if it actually is possible from a hardware point of view ( socket, heat sink and so on) but if it is possible and the installation is possible then I would certainly try and see what happens. Thanks for any input !