I have one bread and butter app that's still 32 bit — other apps perform the same task but not nearly as quickly so I keep it on a separate drive that boots into Mojave (interestingly, it runs much, much better there than High Sierra).

Otherwise, my iMac Pro runs Catalina. I had to wait a long time for many apps to transition to 64 bit and it cost me some upgrade money before I could make the switch, however.

The same thing is happening with Big Sur. I make over half my income using an app that is almost OS 11 compatible. Almost isn't good enough when Time=$$$$.

Mojave is still a supported MacOS till November 2021 while High Sierra is not. Support means Security updates and phone support for MacOS issues–just about everything except 3rd party application support.


BIAB 2024 Audiophile Mac
24Core/60CoreGPU M2 MacStudioUltra/8TB/192GB Sequoia, M1 MBAir, 2012 MBP
Digital Performer11, LogicPro, Finale27/Dorico/Encore/SmartScorePro64/Notion6 /Overture5