MacDoom shareware release date?

[Dynamo]

On this Doomworld page, there is a download link available for the shareware version of MacDoom. I have been curious on the exact release date for this version of the game. Doom II released commercially on June 27, 1995 for the Mac, but I am wondering if the shareware release of the first Doom came before or after. I looked up the dates on the shareware files in SheepShaver but they don't seem to offer any definitive clue.

 

 

Maybe there is an old announcement post somewhere that has been preserved?