Thanks for joining us here, SAS8.
Let me help you in opening your company file.
One possible reason why you can't open it is due to the incorrect file. Make sure to rename the correct file and check if it's in the right file type. For backups, QuickBooks for Mac creates a DMG file.
Also, the DMG file cannot be restored directly. Double-click the DMG file and drag the copy of your company file to the folder where you keep your QuickBooks company. You can follow the detailed steps here: Restore your backup company file for QuickBooks Desktop for Mac.
Keep on posting here if you need anything else. Take care!
