Old fonts don't work on new computer

[Leslee Sipress]

After many years I got a new Mac and now have the full CC subscription.  I have docs in InDesign that used ITC and truetype fonts on the old system and the fonts don't work now.  For example, I need to use Garanond Titling and Maiandra GD fonts (as examples) and can't find the new versions anywhere.  I need to get my docs usable in new CC apps.  I don't know what to do next.  Thanks for any help.

[Imaginerie]

Adobe have ended support for Postcript type 1fonts a while ago now.

If that's the case, see this post here with the announcement...
https://community.adobe.com/t5/adobe-fonts-discussions/support-for-authoring-with-postscript-type-1-...

You will need to find more recent fonts

You can see what's on offer on Adobe Fonts (https://fonts.adobe.com/)
they are included with your subscription, no need to buy those again...

You can then run a find and replace fonts in InDesign
https://helpx.adobe.com/uk/indesign/kb/error-fonts-currently-available-incopy.html

Some software (like transtype) offer to convert old PS fonts to Open type ones, but I haven't tried it, so cannot recommend.

If you got an image version of your text, you can ask InDesign to match the font, and find it for you:
https://bringyourownlaptop.com/courses/adobe-indesign-cc-advanced-training/what-the-font-font-guess-...

Hope it helps!