Question 1

Is this compatible with the a 21.5 mid 2011 imac?

Accepted Answer

Yes,  I've installed these on multiple MAC types.  Be careful taking that screen off!  I had an oopsie on one of the MAC's we converted to SSD.

Question 2

Have an issue getting this ram to work in a HP Compaq Pro 6000, even though this exact time, timing and Latency values are spot on, whats in the HP documentation. (Including the system will take this size of ram as well)
This ram also pulls up for this system using neweggs Memory Finder.
Both ram sticks do not seem to function and will cause the Computer to Give off a memory beep Diagnostic Error. Anyone else have compatibility issues with HP systems with this ram set?

Accepted Answer

I did not have issues with this ram, although I put the memory in a different Mobo than you did.

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