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)
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)
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.
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.