What is a .CASS file?
A .CASS file is a special kind of computer file that acts like an old-fashioned cassette tape but for the Apple II computer. Back in the day, the Apple II computer could use cassette tapes to load and save programs, just like how you might listen to music on a tape. The .CASS file takes the information that was on these old tapes and changes it so that it can work on modern computers, specifically Macs.
To use a .CASS file, you need a special program that pretends to be an Apple II computer. This program is called Virtual ][, made by Gerard Putter. It's like a time machine for your Mac, letting it run old Apple II programs as if it were an Apple II itself. When you open a .CASS file with Virtual ][, it's as if you're putting an old cassette into an Apple II, but it's all happening inside your modern computer.
So, if you're interested in experiencing or playing around with programs from the early days of personal computing, and you have some of these .CASS files, you'll need to download and use Virtual ][ on your Mac. This way, you can open and run these old programs just like someone would have back in the 1970s or 1980s with an actual Apple II and cassette tapes.
Verification
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