How to Boot into Recovery HD Partition on a Mac OS X with Yosemite, Mavericks, & Mountain Lion

All Macs with OS X Mavericks, Yosemite, Lion, Mountain Lion, have a bootable Recovery partition that can be accessed in case of system problems, allowing you to troubleshoot, restore from Time Mach…

How to Perform a Clean Install of OS X Mountain Lion on Startup Drive

How to format your drive Mac OS Extended (Journaled) on Mac OS 10.6 (Snow Leopard) to Mac OS 10.10 (Yosemite)

hard drive - Resizing dual boot partitions in Yosemite - Ask Different

OS X El Capitan / Sierra / High Sierra Hanging on Boot [FIXED] - Justin Silver

How to Access Terminal via Recovery Mode for Mac

How to Create a Bootable Install DVD or USB Drive of OS X 10.8 Mountain Lion « Mac OS Tips :: Gadget Hacks

Troubleshooting

Rosetta Crashes Resolved with Mac OS X 10.6.8 Security Update 2012

How to Remove OS X Mountain Lion (or Any Other Mac OS X Boot Partition)