Here are a couple things to check on:
1. After installing a Font file, check if the font shows up in Notepad (Windows) or in TextEdit (Mac)
2. On a Mac create a text with the letter "A" only.
3. If this saved pln is opened on a pc, open the text settings the Font will be okay (no [ ] around the font and it will show as Western in the font script popup. If the opposite is done, from PC to Mac, with the font script set to Central European the Text Setting popup will have this: [MyFont Central European], the font encoding will be behind the text.
On a Mac, all font has one, and only one font script that defines it. On a windows a Font's different scripts are all defined as separate fonts. If the pc font script used is not the one that the Mac happens to use, the font will show as missing.
So our suggestion is to use the one font script that is shown in the text setting on the pc when the "A" (that originated from the Mac) is opened. Most probably it will be Western. The texts created with the text tool will not cause a problem, those are unicode compatible.
Inside one platform using a CE font or on Windows ce font script is a solution as well.