![]() Quit Terminal after the command finished. Migration Assistant, again part of the full-blown OS X, handles this already, transferring your files across a local network or double-ended cable. Open Terminal (menu 'Utilities') Type in diskutil coreStorage list and look for the UUID (you will need it in the next step) Type in diskutil coreStorage delete lvgUUIDlvgName where lvgUUIDlvgName is the UUID you found before. In the Recovery app, choose Utilities > Startup Security Utility. Startup Security Utility: Set the security policies for your Mac. To return to the Recovery app, choose Disk Utility > Quit Disk Utility. 5) Select the administrator account > Next > enter this admin account’s password > Continue. In the Recovery app, select Disk Utility, then click Continue. 2) Press and hold Mac’s power key until you see the Loading startup options screen. Neither should you use this method to transfer your files from one Mac to another while upgrading your system. 1) Click the Apple icon, choose Shut Down and wait for your Mac to shut down completely. You can't reinstate individual system files or discrete working files - for that you should use Time Machine itself within OS X. Reinstalling in this way is an all-or-nothing option. If your Time Machine vault has been unplugged for the last month, the reinstalled system will have lost any work completed during that time. Only select this option if you know for sure that your Time Machine archive is up-to-date, as it will reinstate your system's last-known condition. (If recovery mode doesnt appear, restart your Mac and try pressing the keys again. Your Mac will load straight into recovery mode. ![]() Youll see a progress bar appear, and you can release the keys after you do. By far the simplest method is to recover your system from a Time Machine archive - Mac OS X Utilities can piece together your complete system by reassembling each element from your incremental backups. Press and hold the 'Command+R' keys while its booting. Now that we know our boot drive is in good shape, we can set about reinstalling Lion. You should also verify or repair your disk to eliminate any problems in the structure of the disk's filing system.
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