Original New
Tested working 100%

Compatibility:

For MacBook Pro 13? A1278

For MacBookPro9,2 Mid 2012: MD101LL/A (2.5 GHz Core i5)
For MacBookPro9,2 Mid 2012: MD102LL/A (2.9 GHz Core i7)

Specifications:

Onboard CPU: 2.5 GHz Core i5
Onboard GPU: Intel HD Graphics 4000