Restore backup made prior to upgrade.
You will need to upgrade from CS3 to CS5 or later. See App Compatibility Table - RoaringApps.
How to Downgrade macOS High Sierra
macOS Reversion- How to Downgrade from High Sierra
If you have a complete backup of your Yosemite system, then erase the drive and restore your backup.
That’s not an option at this time...can I uninstall High sietra and if so, how?
Awesome! Thanks so much...Hope desperately it works!
I use Adobe CS3 and all my CS3 was running just fine BEFORE I updated to High Sierra. Now my CS3 Indesign does not run properly. It will open up but all the tools and menu bar areas are blank and when I try to open up a new document it opens up
