OS X Mountain Lion: Rename your hard disk
OS X Yosemite: Rename files, folders, and disks
Your computer’s internal hard disk is named Macintosh HD by default. It’s OK to rename your hard disk, if you like.
- Click the Finder icon in the Dock, and then choose Go > Computer.
- Click the Macintosh HD icon and press Return.
- Type a name.You can use numbers and most symbols. You cannot include a colon (:) or start the name with a period (.).
- Press Return.
Changing the name of your hard disk does not change the name of your computer when it appears on a network.
Oh... And it is always good to have a valid backup: Mac Basics: Time Machine backs up your Mac - Apple Support
developerdee wrote:
if I change the name of the drive to 10.10.2 will I have problems locating files?
No. You shouldn't have any problems with locating your files.