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> My customers have included a lot of real businesses running legacy software who want the fastest, least intrusive, and least energy intensive Mac OS 9 desktop machine they can buy. I've sold to dentists, veterinarians, museums, and auto repair stores. You'd be amazed how many people are running Classic Mac software in 2025.

Is there any software that only runs on System 7, and not 9.2.2?

Yes, but it's very uncommon for it to still be in use beyond hobbyists.

Are there a lot of people still running legacy FileMaker setups?

Yes, but several Filemaker versions run under Mac OS 9 so there's no reason to go back to System 7.

Did you have to do anything special to get the SSD to play nice with OS9? I tried adding one to a 300MHz G3 iMac and it took forever to initialize on boot and would randomly stall a lot.

I use a mSATA to IDE adapter that I buy in bulk. This is the Amazon available equivalent of it: https://amzn.to/48qEaOm

I use only 128 GB mSATA cards from reputable brands.

I always do the following:

- Boot from the Mac OS 9 Lives 9.2.2 image (v9 of the image) by CD

- Wipe the SSD using Disk Utilities 2.1

- Restore from the CD

I will say this fails perhaps 1 out of 20 times. Hard to say how often this is an actual hardware failure versus some kind of incompatibility with the mSATA SSD since I do use a range of brands. I am always using the same adapters.

Seems more of a curiousity than something practical - in particular, the System 7 "native" on the Mac mini G4 is missing a lot of drivers. There aren't that many situations where software runs well on System 7 tha doesn't on Mac OS 9.2.2, and for the rare case that it does, emulation in something like vMac is sufficient.

Wow this is neat!!! Put on my list to order sometime soon!