Updating mac os x 10 3 9
All newly purchased products require newer OS X versions and cannot be installed on older versions.
Text Edit was updated to support Microsoft Word documents.
Always back up your Mac before installing system updates.
As usual, the easiest way to do that is with Time Machine, just start a backup and let it complete before proceeding with the update.
Installing 10.9.3 requires a download and reboot, the package size varies depending on the Mac being installed on, but should be roughly 400-500MB.
For users who don’t want to update through the App Store, OS X 10.9.3 Combo Updaters will be made available shortly from Apple.Panther improved performance in almost every area, especially graphics.