Apple has a problem with a lot of things but that's irrelevant.
I don't know of any software that can void a warranty except, maybe, if you're doing some advanced BSD level stuff like trying to manually set CRT refresh rates and somehow get it to fry the CRT. Of course, they'd have to be able to prove that you did this which would be very difficult since you could restore the software and claim that was a troubleshooting measure.
Basically, Apple's warranty covers hardware. What you do with software is your business since software doesn't physically damage computers.
I've been using ShapeShifter since one of the early 1.x series and it's never given me any grief. I'm running it on a very old Mac too, if there's a performance hit I don't notice it so if you're on anything modern I doubt you will either.
I don't know of any software that can void a warranty except, maybe, if you're doing some advanced BSD level stuff like trying to manually set CRT refresh rates and somehow get it to fry the CRT. Of course, they'd have to be able to prove that you did this which would be very difficult since you could restore the software and claim that was a troubleshooting measure.
Basically, Apple's warranty covers hardware. What you do with software is your business since software doesn't physically damage computers.
I've been using ShapeShifter since one of the early 1.x series and it's never given me any grief. I'm running it on a very old Mac too, if there's a performance hit I don't notice it so if you're on anything modern I doubt you will either.