I just suffered through a 5-month "experiment" of what happens when you upgrade an early-2011 Macbook Pro with "G.SKILL 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3 1333 (PC3 10600) Laptop Memory Model F3-10600CL9D-8GBSQ" from Newegg, i.e., the same memory that 2 people above in this thread say was working for them.
Here's what happened:
* rare application crashes, usually involving "Exception Type: EXC_BAD_ACCESS (SIGSEGV)"
* rare OSX crashes (such as the Crash Reporter crashing, lol)
* even rarer kernel panics
* every now and then, an unexplainable rash of crashes all in one day, and then a week with no crashes.
Eventually it seemed like something else was up other than just a complex mess of applications and settings in my account (since I transferred this account across 2 previous generations of MacMinis, including a G4, and also started running a couple Parallels VMs, it seemed reasonable that I should probably expect some trouble for pure software reasons,).
So I ran intensive all-night memory tests in single-user mode using MEMTEST. No problems found. I ran Apple Hardware Test all night. No problems. So I did clean hard drive wipe and reinstall of Snow Leopard and reinstall of applications. Same problems continued happening.
Then I took the laptop to an Apple Authorized Service Provider who ran the toughest hardware tests they have, also overnight, including a specific focus on this G.Skill memory. No problems found.And they said this G.Skill memory should generally be fine for use in a Macbook. But it might be worth a try anyway to swap it out for different memory.
So I did. And it fixed the problem. I swapped out the 8GB of G.Skill for 8GB of Crucial brand memory and the problem has totally disappeared.
