My Late 2008 MacBook running El Capitan 10.11.6 (could use a RAM upgrade to 8GB and the HDD upgrade to an SSD to make it swifter than it is currently). : r/macbook
JetDrive 720 | SSD Upgrade Kits for Mac - Transcend Information, Inc.
Amazon.com: Padarsey 2nd HDD SSD Hard Drive Caddy Tray Replacement for MacBook Pro 13/15/17 inch A1278 A1286 A1297 2008 2009 2010 2011 2012 Internal Laptop CD/DVD-ROM Optical SuperDrive Adapter to 2.5 Inch 9.5MM : Electronics
MacBook Pro 15" Unibody Late 2008 and Early 2009 Hard Drive Cable Replacement - iFixit Repair Guide
Such a beautiful machine. MacBook Pro 17” 2008 with glossy hi-res 1920x1200 display. With a new ssd, battery and ram it's blazing fast : r/mac
Installing SSD (Solid State Drive) in Your MacBook Pro 13" or 15" Unibody : 24 Steps (with Pictures) - Instructables