@bb1a99d2 

That was Omnigraffle, saying that it could no longer import EPS objects for use in drawings and diagrams, which is a loss.  Now I'll need to go convert them all to PDF using Adobe Illustrator.

The bigger issue, from my point of view, is Apple's gradual frog-boiling away from open standards and toward proprietary and walled-garden things.  I'm not super wound up about PDF, but PDF is worse than EPS in terms of interoperability.

The real heart-breaker was the loss of XMPP support in 2018.