I swapped memory in my 2010 mid Macbook pro. The RAM is labeled PC3 10600, just as the RAM that was previously in the machine is labeled.
However, with the new RAM in the machine, ssh is unstable - which makes Time Machine fail, for instance - as well as having interence on USB audio. Swapping back fixes the issue.
But no amount of RAM tests find fault in the new sims.
It's very frustrating! Has anyone else had this issue? Time Machine failing with new RAM?
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