Chosen Solution
I have a mid 2010 13” MacBook Pro. 2.4GHz Core 2 Duo, running High Sierra 10.13.6. Boot Rom 66.0.0.0.0SMC 1.62f7 I recently purchased a RAM upgrade 8 GB x2 SO-DIMMs to get to 16 GB (1066 MHz). But when I install them my Mac won’t start up. If I use the stock 2 GB memory it starts just fine. I have tried every combination of sticks and slots, but it will only work at the max of 10 GB. Please help. Update (06/18/2019) Model Identifier is MacBookPro7,1 the other numbers are in the original post.
Could be a bad slot or your EFI didn’t get upgraded. Go “about this Mac” memory and see what each slot is reading. It looks like it is reading one as 8 GB and the other as 2. Remove the stick that is reading as 8 and reboot with just the one remaining stick still in it and tell us what it reads. UPDATE Use these steps to check your Mac’s EFI Boot ROM and SMC firmware versions. Open System Information. Apple Menu > About this Mac > Overview > System report.Select the Hardware section to view the Model Identifier, Boot ROM version, and SMC version numbers.MacBook Pro (13-inch, Mid 2010)MacBookPro7,1MBP71.0039.B0E (EFI 2.5)1.62f7 (SMC 1.6)https://support.apple.com/kb/DL1478?loca…https://support.apple.com/kb/DL1626?loca…
I loosen the screw where you put the cards in then reinstalled 2 x 8 GB then rebooted the beebs stopped and it started up! So happy! see video about loosening the screws to card section if computer beeping on you tube. Saved Mr from sending it back to owc.
