System 7.5: Monitor Extensions Described (2/95)


I noticed in my system folder that there are a variety of files titled xxx Monitors Extension where xxx is the name of a Macintosh computer. What are these files for and do I need all of them?

The various monitors extensions add options to the Monitors control panel. The options added vary from machine to machine and depend on several factors including the Macintosh model and the video hardware that is installed.

There are six different monitors extensions. They are:

IIci/IIsi Monitors Extension
LC Monitors Extension
PowerBook Monitors Extension
Quadra Monitors Extension
Quadra AV Monitors Extension
PowerPC Monitors Extension

All the extensions contain the video card information strings such as "Macintosh II built-in video". The extensions also contain the monitor information strings that show the resolution and scan rate for the attached monitor.

The PowerPC and Quadra AV Monitors extension also include the AV video display options.

The IIci/IIsi Monitors Extension also contains the options for setting the maximum number of colors that can be displayed since these machines used RAM for the video.

The PowerBook Monitors Extension also has a gamma setting that can be used on the color PowerBook computers.


Article Change History:
16 Feb 1995 - Changed keyword and reviewed for technical accuracy.

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Published Date: Feb 19, 2012