#Mac os x lion 10.7.5 wont update mac os x

Some users report that “ zapping the PRAM” is sufficient to get past this roadblock.

The same is true if the Install application simply stalls before completing. If you see this unwelcome message, chances are slim that trying again will lead to success.

Click restart to restart your computer and try installing again.

#Mac os x lion 10.7.5 wont update mac os x

Mac OS X Lion couldn’t be installed, because the disk (volume name) is damaged and can’t be repaired. This folder, created by and used by Time Machine, is fooling the Install app into thinking your startup drive is actually a Time Machine backup. As covered in an Apple Support Communities thread, the likely cause is an errant Time Machine-related Backups.backupdb folder at the root level of your drive. The message can appear even though your startup drive is obviously not acting as a Time Machine backup. This message again means that the Lion installation will not successfully complete. This disk is used for Time Machine backups If this resizing trick fails, you will likely need to reformat the drive. When done, you can restore the partition to its previous size. This disk cannot be used to start up your computerĪpple offers no explanation as to why the installation may balk here, other than to say it can happen in “some situations.” However, Apple does provide a solution: Restart your Mac, launch Disk Utility and, from the Partition tab, slightly reduce the size of your startup partition (by as little as 128MB).