Apple Releases macOS High Sierra 10.13.6 With AirPlay 2 Multi-Room Audio Support for iTunes - MacRumors
Apple MacBook Pro A1278 13.3" 2011 Intel Core i5 2.4GHz 4GB 500GB HDD BT 10.13.6 | eBay
Awesome Apple MacBook Pro A1278 13.3" 2011 13" i5 2.4Ghz 500GB 6GB 10.13.6 | eBay
Restored Apple MacBook Pro Laptop, 13.3", Intel Core i5-3210M, 8GB RAM, 500GB HD, DVD-RW, Mac OS X 10.13.6 High Sierra, Silver, MD102LL/A (Refurbished) - Walmart.com
Apple MacBook Pro 13″ Early 2011 Core i5 2.3GHz 4GB 320GB DVD-RW macOS 10.13 High Sierra – Refresh Computers Online Marketplace
bootcamp - Installing Windows 10 or 8 on macOS High Sierra 10.13.6 MacBook Pro mid 2012 - Ask Different
APPLE OS X HIGH SIERRA 10.13.6 MACBOOK PRO MAC 250GB 2.5" BOOTABLE HARD DRIVE | eBay
Apple Releases macOS High Sierra 10.13.6 Beta 4 [Download] - iClarified
How to Update to macOS High Sierra 10.13.6 - YouTube