| Tip 160 | Back Up Without a Time Machine Disk |
When Time Machine is used on a portable Mac, such as a MacBook Air, OS X is clever enough to realize there are times when the computer won’t be attached to the Time Machine disk (or within range of the Time Capsule). Therefore, it temporarily backs up to the computer’s hard disk, creating what are known as snapshots.
With desktop Macs like the iMac, this feature isn’t activated because it’s assumed the Time Machine disk will always be connected or that the computer will always be in range of the Time Capsule. But this might not always be the case. Perhaps you sometimes disconnect your Time Machine disk because you temporarily need the USB port it uses for other things, for example.
Enabling Local Snapshots ...
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