Reasons for using itandalone installers vary but some common ones include:

• To save the update ( to CD/DVD or disk)
• Install it on multiple Macs (easily transported to different Macs)
• To download and install it at a later time
• The Mac that needs the update does not have an internet connection

Apple standalone updates can be obtained from the Apple Support download page .

How do I install a standalone update?

1. You download the installer to your Mac
2. Mount the associated disk image
3. Launch the Installer package

Note that if you save a standalone update to a CD or DVD, you must copy the disk image to your Mac before it can be installed.  The following guide describes the two types of standalone installers, Delta and Combo.

Be Careful
You should read the documentation from Apple before using a standalone installer.  You should only install them on compatible systems and in the correct order.