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Defragmenting Your Startup Volume |
iDefrag’s offline algorithms require exclusive access to the volume which rules out the volume that you booted from. There are a number of solutions to this:
The easiest option is to allow iDefrag to restart into a special mode where it has exclusive access to the startup volume. To do this, simply select the Go button (which will show a small restart badge) and follow the instructions.
Another option is to boot from another partition (either on the same disk or on another drive, internal or external). To do this, you need to install OS X on another disk and then boot from it. We won’t go into detail about this process here but you should be able to find instructions on the Internet and our support team will help you if you get stuck.
If you have more than one Mac and are able to connect them using a FireWire cable, you can use Target Disk Mode. See this page on Apple’s support site to learn how to do that.
The last option is to create a boot disk (usually a DVD, but it can be a CD on some older machines). To do this, select “Create Boot Disk⦔ from the iDefrag menu and follow the instructions. You will need a DVD writer and some recordable media.