Adobe Garamond Expert no longer working?

Adobe Garamond Expert Postscript type 1 is one of my most important font sets, used in all important documents, and it now has the same invisibility problems you had. Your guess that it may be an operating system (OS X 10.x) problem seems correct.
The font remains invisible in applications (except regular and semibold
in Adobe Illustrator), but when the document is exported from Quark to Acrobat all the Expert type shows up fine.
Another person using the same version of Quark and the exact same set of Expert fonts has no problem, because he is still using OS X 10.4.11.
Unfortunately, I can't find an Opentype version of the Expert set, which might remain visible.

I am able to use both the Type 1 PostScript fonts Adobe Garamond and Adobe Garamond Expert on my Mac running 10.5.7. This through Suitcase Fusion 2. I don't have Font Book on the hard drive.

The Expert font shows up in the Font Book.app list, but is blank when I choose its preview, and using it in an app like Word 2008 results in blank glyphs.

This is actually correct. There are very few glyphs in the majority of the Expert fonts. In fact, Adobe Garamond Titling Capitals is the only one with at least some common characters. 0 through 9, upper case A through Z and a few punctuation marks (along with a couple dozen extended characters). You'd see in Word, InDesign or Quark that if you type with caps on, you'll get characters A-Z. But if you switch to lower case, you get nothing. Or, in the case of Word, it jumps back to the default font. That's because there are no lower case glyphs in Titling Capitals.

As Leopard is much more of a complete Unicode system, the glyphs you're looking for can only be easily accessed with the Character Palette. The best method there is to change the upper left pull down menu to "Glyph". When the lower part changes to reflect the main input method, click on the "Glyph Catalog" tab. Choose AdobeGaramond as the main font in the left pull down menu. Then in the right pull down menu, choose the sub heading, such as "Adobe Garamond Expert Italic".

Unfortunately, I can't find an Opentype version of the Expert set, which might remain visible.

There isn't one. There are two OpenType versions available. "Adobe Garamond Pro" and "Garamond Premier Pro". Be aware though that these versions are not the same as the Type 1 PS set "Adobe Garamond". The kerning is very noticeably different. One example is in the word "The". In the Type 1 PS font, there is a space between the T and h. With either OpenType version, the T and h overlap. That's just one kerning difference I noticed right away.

Actually, besides Adobe Garamond Titling Capitals, the Expert fonts regular, bold, etc. create excellent small cap alphabets. It is these which have become invisible with the new Mac OSX 10.5, but which print out ok when the file is converted to Acrobat.
I tried the Suitcase Fusion 2 demo but had no luck with it in Quark or in InDesign.

Looked through the glyphs a bit more closely this time. 😉 I'm viewing the fonts in FontLab so I can see all glyphs within a font.

Expert Regular has small caps A-Z (they're even labeled Asmall-Zsmall), superscript and subscript numbers, but no normal case glyphs. Expert Semibold is the same. There are a couple dozen or so other glyphs in these fonts (ligatures, fractions, monetary symbols, etc.).

Expert Bold, Italic and Semibold Italic contain no small caps at all.

Yes, sorry, I forgot that expert bold didn't have them. Are you able to type in lower case letters and see the small caps appear in garamond expert on screen?
TextEdit allowed me to double-click on individual letters in the special characters glyphs palette and spell words in expert regular and semibold and even print them out, but it is unable to do so through keyboard input.

Hi surf220,

Yes, I am able to type in the small caps for Expert and Semibold Expert in both InDesign CS4 and Quark 8.1. It does depend on how you do it.

The Titling Caps glyph ordinal positions in the fonts are where the normal uppercase letters would be. So caps lock needs to be on to produce anything on screen.

The small caps glyphs for Expert and Semibold Expert though are in the ordinal positions where lower case letters would normally be. So type them just as if you were typing in any lower case characters and they'll work. You also must have the All Caps button off in InDesign, as that will have it accessing the wrong glyph locations in the font. Same thing in Quark. Don't use the Small Caps option or you won't get the small cap characters. They must be typed as plain ol' lower case characters.

Thanks. Apparently I need to upgrade from Quark 6.5 where the problem occurs.
I was mistaken in thinking that InDesign had a problem too, because I was forgetting there was no small caps expert bold version at the time.
So it looks like the problem is probably NOT in the operating system.
Excellent!

Thought I'd better mention that (at least in OS X 10.5.4) Word 2008, Font Book and TextEdit can't preview the affected glyphs either.

For TextEdit, Font Book or Word, you have to use the Character Palette. You would kind of think Word would have a glyph viewer of some sort, but Microsoft never really intended for anyone to use Word as a page layout program, even though it has some layout features in it.