However, the new version may not support some older media formats that QuickTime 7 handled with aplomb see this Apple support document for details. Check this option to install QuickTime 7 for backward compatibility.
If your Mac has an active license for QuickTime Pro 7, this option will be enabled by default. After choosing your options, click OK and then click Install, verify that you want to install, and enter an admin-level username and password. Indeed, installing Snow Leopard on a Mac mini took just under 29 minutes from the time I provided my username and password to the post-install restart—noticeably faster than installing Leopard on the same machine. Restarting was faster, as well: the initial restart after installation, which is usually the slowest type of restart, took just over one minute.
For example, the installer disables most input managers, kernel extensions, mail plug-ins, and system hacks that are incompatible with Snow Leopard or are known to cause problems. However, others—incompatible kernel extensions, for example—are actively relocated. Release the key when the Apple logo appears and wait for the loading to finish.
After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities' menu. After Disk Utility loads select the out-dented disk entry from the side list mfgr.
Set the number of partitions to one 1 from the drop down menu. Finally, click on the Apply button. After formatting has finished quit Disk Utility.
Continue with the OS X installation and follow the directions. When the installation has finished the computer will restart into the Setup Assistant. After you complete the Setup Assistant you will be running a fresh installation of Snow Leopard. Open Software Update and install the recommended updates.
This method is a good way to totally reset your Mac and clear out any old files and applications that might be slowing your computer down. You will need a Snow Leopard installation disk e. Note this method also removes the system restoration partition created by Lion. Backup all your documents and files to an external hard drive. This is necessary to keep all your documents, music, videos and such. You will need to copy them back onto your Mac manually later on. In the sidebar find the drive that contains Lion, select it and click on the Partition tab.
In the drop-down menu labelled Partition Layout , choose 1 Partition and hit Apply. Quit Disk Utility to return to the installer screen and continue with the Snow Leopard installation. When Snow Leopard has been installed successfully, manually copy your files across from your backup disk. Run Software Update to make sure your Mac is fully up to date. You will also need to re-install any applications.
Downgrading using Time Machine is probably the easiest way to go back to Snow Leopard, because it returns the OS, applications and files exactly back to the state they were in before you installed Lion. When the list of startup options is displayed, choose Recovery HD to start in recovery mode. Make sure that your Time Machine backup disk is already connected. In the list shown, click on the volume that contains your backup. Next, select the date that you want to restore your Mac to.
Dates and versions are clearly displayed so just use the most recent Snow Leopard backup before you installed Lion. The last task is to manually copy over any documents that may have changed since you installed Lion.
If you previously created a bootable Snow Leopard replica of your Macintosh HD with Disk Utility, then you can completely restore everything to Snow Leopard as follows. For this step, you'll use Disk Utility from the Snow Leopard installer. Here's how:. After you reboot the Mac, the Snow Leopard installer asks which language you want to use as the main language.
Make your selection and click the right arrow key. Disk Utilities launches. Select Format a hard drive. You are returned to the Snow Leopard Installer to continue the installation. To complete the installation, follow the Snow Leopard basic install instructions. You now have a clean installation of Snow Leopard using a method that mimics the Erase and Install option available in previous versions of OS X.
To access the store, you might need to update your system software. Select Software Update from the Apple menu. This article has been archived here for posterity. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content.
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