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The Installer would be installed on every Mac OS X computer, and it would run from the hard drive. 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 Apple Installer appears as a centralised application programme under Mac OS X. The Apple Installer in action under Mac OS X It now is an "umbrella" installer, including routine that had to be otherwise independently executed, such as disk checks. The Apple Installer continued to evolve under Mac OS 7.6. It also offered the option of a clean install. 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. The Apple Installer evolved under System 7.5 - greatly. 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. It did not permit the user to switch back to the Finder once it was launched. The Apple Installer was a dialogue box under earlier versions of the system.
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