Ii was the original ASIair and I didn't get Stellarmate working. My problem was my total lack of familiarity with the Indi world. I did get my Sony A7R recognized at some level but couldn't navigate through the architecture to figure out what i needed and how to make it work.
I have an ASIair Pro now and an ASIair Plus arriving next week. If I get bored I could try again with the Pro model.
For Your information I succeed on making stellarmate working on ASIAIR pro easily.
Just install OS in sdcard and make modifications in configuration like described above to make DC outputs working.
Thx Laurent. That wasn't my problem. I installed SM OS easily and it booted up fine. It was the total ignorance of how to get my A7R fully operational that flummoxed me. It recognized my Sony A7R but I couldn't do anything. It was lack of Sony support in ASIair that drove me to try SM OS. I still have two cameras that I wish I could use - a full spectrum Sony 7R and an Altair Hypercam 174 (which has a fan, not cooler). If it was easy I would convert my Pro RP4 to SM OS and run my new ASIair Plus with its cameras (I have 4!) and a astro modded Canon 6D. I have no experience with Indi, KStars, etc. That's what stopped me cold.
I would try it with the free Astroberry first. To know it would not harm the Pro would be assuring. Having a Pi with 12v ports would be a Plus instead of investing in another Pi. You see I have the ASIAir Plus already and want to find the Pro useful in another way. So Laurent you can go back to the Pro original use after using it as a Stellarmate OS? Either company will not confirm it, they just say they don't support it of course.