Is it in principle possible to swipe the hard disk out of a MacBook, swipe a new (blank) hard disk in, install the OS on the new disk, then swipe the old disk back in and find the machine operational again?
I would like to tinker with a new hard disk (bootcamp and perhaps rEFIt), but if that fails, I'd like to continue from the installation I have right now.
Edit Clearly, the hard disk will be unchanged. My question is whether the process of installing OS X / bootcamp will change something (SMC, PRAM, ...?) that makes the machine incompatible with the previous installation.