RAM upgrade and/or SSD drive – what's the benefit?
How to Upgrade MacBook Pro Hard Drive (Unibody, 2009-2012): EveryMac.com
How to add a fast new SSD to your old Mac or MacBook for only $150 - 9to5Mac
MacBook Pro 15" Unibody Late 2011 Hard Drive Replacement - iFixit Repair Guide
Apple 15-inch MacBook Pro (Late 2011) Review
Installing MacBook Pro 15" Unibody Late 2011 Dual Hard Drive - iFixit Repair Guide
Replace your 2009-2012 MacBook Pro HD with an SSD
15″ MacBook Pro (Late 2011) | Low End Mac
Apple MacBook Pro Late 2011 8GB Memory & SSD Upgrade - YouTube
If I upgraded my dead late 2011 Macbook Pro with an SSD, more RAM, and a fresh battery, could I run anything later than High Sierra on it, or is that kind