Comment by ckastner

somewhat related:

"Seymour said he thought it was odd that Apple bought a Cray to design Macs because he was using Macs to design Crays. He sent me his designs for the Cray 3 in MacDraw on a floppy.” reports KentK.

https://cray-history.net/2021/07/16/apple-computer-and-cray-...