Check out my post in the mini 9 OSX forums, the highest you can go is 10.6.5 from memory, I have one working mini 9 64 gig runcore SSD running this OS currently.
You can get everything working including the mic but its been a few years since I played with a dell mini 9 - kinda left them in the bottom draw only just pulled one out to check the battery.
Hi grungy, I saw your post about running snow leopard on your mini 9. I’d love to do this to mine but can only find guides and instructions for 10.5.5 I have hackintoshed several mini 10vs with snow leopard but would love to “ convert” the 9. None of the original links are any good any more.
Any advice you could offer would be greatly appreciated.