I have Indigo 7.4 running well and attempting to upgrade to 7.4.1. After downloading the file and attempting to open it, I receive the following error message:
indigo_7_4_1.dmg image not recognized
I re-dowloaded the file thinking maybe it became corrupted but with the same result. Is my machine just to old now?
I'm running Indigo on an iMac (21.5-inch, Mid 2010) with macOS Sierra version 10.12.6
Thanks, Butch