Backing Up Your Mac: A Joe On Tech Guide by Joe Kissell

Author:Joe Kissell [Kissell, Joe]
Language: eng
Format: mobi
Publisher: alt concepts inc.
Published: 2015-06-02T04:00:00+00:00

Beyond the items just listed, you might in some cases want to think about whether to exclude the following:

System files: The files that make up OS X—the contents of your /⁠System and /Library folders, various invisible files and folders at the main level of your hard disk, and the apps included with OS X, such as Mail and Safari—are all included by default in a Time Machine backup. That’s a good thing, as it enables Time Machine to restore your whole system, or any part of it. However, if you’re running out of space on your backup disk and you already have a bootable duplicate or two (see Create and Use a Bootable Duplicate), you could exclude the system files to save space. You may especially want to do this if you’re backing up several Macs over a network, because those additional files can chew up a lot of disk space and network bandwidth. To exclude system files, add the folder /System to the Exclude These Items from Backups list. The alert shown in Figure 9 appears; click Exclude All System Files.

Figure 9: When you tell Time Machine to exclude your System folder, this alert asks if you want to exclude all of OS X.

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