It sounds like you might have a corrupted ArtRage preferences file.
To delete the ArtRage preferences file, first make sure ArtRage isn’t running – you might have to force-quit ArtRage from the dock menu.
From your MacOS file explorer menu:
1. Click on the Go Menu.
2. Hold down the Option key - This adds a Library item to the menu. Select that.
3. Open Application Support / Ambient Design / ArtRage
The ArtRage6.PRS is in there.
Move the ArtRage6.prs file to the trash.
When you start ArtRage it will start up with the default settings.
AndyRage's mantra for graphics engine code:
"Sure - how hard can it be?"