Is this AutoCAD for MAC? That forum is over here https://forums.autodesk.com/t5/autocad-for-mac/ct-p/4051

Click on the REPORT button in your post to ask for it to be moved there. Remember to add to your post some additional relevant information like exact AutoCAD for MAC version as listed in ABOUT command, what video card and/or Mac device you are using, and your exact MacOS version.