If I install additional memory on my new 27-inch iMac, does that void my warranty?
Apple business rep told me that upgrading RAM on my new 27-inch iMac voids my warranty. Apple support said that is not correct. What say you?
No.
All though, it is a good to keep the factory modules around (if you upgrade all 4 slots) for the propose of testing and/or an unexpected service visit.