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I have a 2009 15” Dual Core 3.0 gz MacBook Pro with 8GB DRAM, and a 1TB Samsung SSD, running OS X 10.11.6.
It runs fine, but,
i. it can’t upgrade to the latest OS from Apple, which leaves me vulnerable to security gaps,
ii. 8GB DRAM is no longer adequate for my needs,
iii. the latest software I use requires at least 10.12.
Is it possible to replace the motherboard within my MacBookPro with a refurbished quad core board that has either 16GB DRAM or 32 GB DRAM and upgrade the OS?
If not, do you sell any refurbished quad-core MacBook Pros with 16-32GB DRAM that can run ?