No, they didn't... I was there. I read every thing from the industry and published a newsletter for the Commodore Amiga. It did not happen... The Atari ST was NEVER SHUT DOWN. If you read the Wikipedia article, you will find NO MENTION of such an event. Do you seriously think that would go unreferenced???? Not by a long shot. It SIMPLY DID NOT HAPPEN!
I thought it was obvious enough I was using “shut down” as a figure of speech. Again what the journals were reporting was that Apple hauled representatives of Atari and DRI into their offices in Cupertino and demanded a longish list of crippling changes to both the 520 and GEM or they (Apple) would simply tie the ST up in courts for ten years and nobody would ever make a dime with it and, again as it was being reported at the time, Atari caved.
Funny thing, they (Apple) got to thinking they could push anybody around the same way after that and tried the same thing with Microsoft and HP (Windows) and it blew up in their faces, HP’s countersuit charged Apple with racketeering and violation of RICO statutes.