You may find that after installing the System 7.5 Update 1.0 you are not able to get Apple Guides to work. AppleGuide 1.2.5, installed by System 7.5 Update 1.0, on Power Macintosh computers may cause this. Mixins installed for features not present in the computer (like AV Mixins installed on a computer without AV technology) causes Apple Guide to "lose contact" with the Macintosh Guide and Tutorial files, all of the Guides no longer work.

A Mixin is an Apple Guide content file that merges with the main Apple Guide file to add extra options. On any Macintosh computer running System 7.5 there is a standard Apple Guide file. However, there may also be other Apple Guide files added to the system depending on the features of that particular Macintosh computer.

For example, there is a file called Speech Guide Additions installed when you install the PlainTalk software. All of the Apple Guide files may stop working if the Speech Guide Additions file is present in the Extensions folder, but PlainTalk has been removed or is not installed. To get Apple Guide to work properly again, remove the unnecessary Mixins that do not belong on your computer. For example, you should remove the PowerBook guide from a desktop Macintosh computer's System Folder.

The only way to mistakenly install Mixins that are not needed by your computer is to do a Custom Install of the System 7.5 Update 1.0 for ANY Macintosh. An Easy Install or Custom Install for your particular Macintosh computer will not install unnecessary Mixins.

Problem with Apple Guide Files on Some Power Macintosh Models

Step 1

Open the Extensions folder (inside the System Folder) and drag the PowerBook Guide Additions file (if present) to the Trash unless you have a PowerBook.

Step 2

Unless your computer is an AV model, drag the following items to the Trash: Video Guide Additions, Video Player Guide Additions, Speech Guide Additions.

Step 3

Choose Empty Trash from the Special menu.

Step 4

Restart your computer.

Other Guide Mixins from Apple or third--party applications may prevent the Macintosh Guide from opening. In some cases, you may need to choose which Guide is more important to you and remove any extra guides which are causing the problem.

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