I'm sorry to hear you're having trouble with Spine 4.2.29 on your macOS Monterey M1. Here are a few steps you can try to resolve the issue:

1. Check the spine.log file: This file can provide more details about why Spine is crashing. You can find it at ~/Library/Application Support/Spine/spine.log. Please review the log for any errors or post it here for further analysis.

2. Run Console app: Open the Console app on your Mac, choose "All Messages," then start Spine and watch the output in the Console app. This can help identify any specific errors that occur when Spine tries to launch.

3. Delete and Reinstall Spine: Sometimes, files can get corrupted. Try deleting the Spine application and reinstalling it. Make sure to back up any important files before doing this.

4. Check for Antivirus or Firewall Interference: Ensure that no antivirus or firewall software is interfering with Spine. Some users have reported issues with such software causing Spine to crash.

5. Try a Different Version: Since you mentioned that Spine 4.1 works, you might want to try running a slightly different version of Spine 4.2, such as 4.2.05-beta, to see if the issue persists.

6. Update macOS: Ensure that your macOS is up to date. Sometimes, updates can resolve compatibility issues.

If none of these steps resolve the issue, please provide the spine.log file and any relevant output from the Console app for further assistance.

You posted this in other discussions, which I have deleted. Please keep your discussions in a single place.

Your launcher is 4.2.15, shown in the first line of your spine.log. You should re-download (from your Spine license page) and reinstall Spine, which will give you the 4.2.17 launcher. We have fixed some problems on macOS that look like the symptoms you have shown.