Hi ebloom, I’m sorry. The system requirements page was wrong: it said Objo Studio runs on Intel Macs, but we no longer provide an Intel build for Objo Studio. The current macOS download is for Apple Silicon only, so it cannot run on your 2018 MacBook Air. Your Sonoma version isn’t the problem.
Objo Studio can still build apps that run on Apple Intel Macs.
The decision was made to stop supporting Objo Studio on Intel Macs once Apple formally deprecated support for Intel.
I’ve corrected the system requirements page. I’m sorry we led you to download an app that could never run on your Mac. Thank you for pointing this out.