SuperCard 4.8 remains 32-bit. Unfortunately, producing a 64-bit version of SuperCard requires a complete rewrite of the software as Apple has gone back on their promise to deliver 64-bit Carbon frameworks. While the current version has made some inroads in this regard, it is far enough from completion that we do not have an ETA for a 64-bit version.
SuperCard is currently compatible with any Mac running macOS versions Tiger thru Mojave, so we recommend holding off upgrading your Mac to Catalina. For users that must upgrade to Catalina, we have confirmed Parallels 15 is compatible with Catalina, and can host a Virtual Machine with an older OS version that supports SuperCard.
If, when launching SuperCard for the first time and entering your name and registration number results in SuperCard quitting, it is most likely due to SuperCard not being installed correctly.
SuperCard requires two folders to be installed:
1.) The "SuperCard 4.8" folder should be placed in "/Applications" (the Applications folder on your startup drive).
2.) The "SuperCard 4.8.0" folder MUST be copied to "/Library/Application Support" (this is in the "Library" folder at the root level of your drive and not the one in your home/user folder).
Your downloaded "disk image" contains a window with aliases (symbolic links) to the correct folders at the right of the arrow symbols next to each of the folder icons. In icon view, dragging the folders on the left to the folders on the right will ensure the folders are copied to the correct locations.
A -61 is an MacOS permissions error and it is most likely the case that SuperCard (as currently installed) does not have write permission to all of the files it needs. You should "get Info" on the SuperCard folder in "/Library/Application Support/" and check the permissions. They should be set to read/write at all levels. If not, change the settings manually.
Regardless of whether you changed the settings, you should then apply the changes to all enclosed items using the popup or button (depending on what version of OS X you're using).