Once your Mac reboots after the installation completes, you’ll probably need to install the appropriate 'combo' update again to get back to the version of OSX you were on, or use Software Update. In the Custom Install pane, select the software you want to install, and then click OK. You can customize some of the software that will be installed, such as printer drivers, fonts, and language translations.

Click Customize if you need to select or deselect optional software.

In the window where you select a disk, select your current Mac OS X disk (in most cases, it will be the only one available, and named Macintosh HD). Select your language, at the Welcome screen click Continue, then Agree to the license. Insert it into your SuperDrive, then either wait for the Mac OS X Install DVD window and double-click the Install icon or power down, then start up normally while holding down the 'C' key.

Start your Mac from your Snow Leopard Install disc.

Ditto any other external drives, just in case.Įnsure that your Mac has uninterrupted AC power. It’s a good idea to eject and disconnect your Time Machine drive, too. See Time Machine FAQ #27 for some suggestions.įirst, turn Time Machine OFF.

Many folks recommend not only Time Machine backups, but also a 'secondary' backup, just in case something goes wrong with the drive they’re on, or Time Machine itself.

Note: after installing the update, don't delete it immediately if it doesn't fix your problem, you may want to reinstall OSX and perhaps apply the 'combo' again.Įffective with Snow Leopard, there's only one Install option, and it shouldn't disturb any of your apps, data, etc., but there’s always a risk of something going wrong, so be sure you have good backups before starting. The next Time Machine backup will be somewhat larger than normal, to back up the changes. (Note: there's a separate Snow Leopard 10.6.8 Supplemental Update: that is not included in the 10.6.8 'combo'.)īe sure to do a Repair Permissions afterwards, per Verify or Repair Disk Permissions. It contains all the updates since the first release of Snow Leopard (thus the clever name). If your installation of OSX is corrupted or damaged, you may want to start by downloading and installing the appropriate 'combo' update.

Macos 10.8 installer