Apple Installer

The Apple Installer is an installer that is responsible for installing the Macintosh system software / Mac OS on Macintosh computers.
There was no Apple Installer in the earlier days of the Mac. Only with the advent of System 6 did the Apple Installer begin to take its shape and form.
==Apple Installer (System 6)==
The Apple Installer was a dialogue box under earlier versions of the system. It did not permit the user to switch back to the Finder once it was launched. Multiple selection of individual items in a Custom Install (as opposed to an Easy Install had to be done -- trickily -- by pressing the Shift key.
==Apple Installer (System 7.5)==
The Apple Installer evolved under System 7.5 -- greatly. Instead of being a dialogue box, it became a separate window, with title bars, resizable windows, and even info buttons and the hierarchical triangular list view copied from the Finder. It also offered the option of a clean install.
==Apple Installer (Mac OS 7.6)==
The Apple Installer continued to evolve under Mac OS 7.6. It now is an "umbrella" installer, including routine that had to be otherwise independently executed, such as disk checks.
==Apple Installer (Mac OS X)==
The Apple Installer appears as a centralised application programme under Mac OS X. Whereas the Classic Mac OS used to include the Installer application along with the to-be-installed software bundle, Mac OS X includes only the software bundle as a package. The Installer would be installed on every Mac OS X computer, and it would run from the hard drive.
The Installer, under Mac OS X, is located in Applications > Utilities > Installer.app.
Category:Installer