I upgraded to macOS Sonoma and SPSS will not open.

If you upgraded to macOS Sonoma, and your SPSS 26 software is no longer working, it's possible that the upgrade may have caused compatibility issues. Here are some steps you can take to try and resolve the issue:

1. Check for SPSS Updates: Start by checking if there are any updates or patches available for SPSS 26 that are compatible with macOS Sonoma. Software developers often release updates to ensure compatibility with new operating systems.
2. Compatibility Mode: You can try running SPSS 26 in compatibility mode. To do this, locate the SPSS application in your Applications folder, right-click on it, and select "Get Info." In the Info window, check the box that says "Open in Rosetta." This will run SPSS using the Rosetta 2 translation layer, which can help with compatibility on M1 Macs.
3. Contact IBM Support: If you can't find an update for SPSS 26 that works with macOS Sonoma, consider reaching out to IBM SPSS support. They may have information or solutions for running SPSS on the latest macOS.
4. Upgrade to SPSS 28: Another option would be to upgrade to a more recent version of SPSS that is officially compatible with macOS Sonoma (or whichever macOS version you are using). Newer versions are more likely to have better compatibility with the latest operating systems.
5. Consider Virtualization: If SPSS 26 continues to have issues, you can consider running it in a virtualized environment. Tools like Parallels Desktop or VMware Fusion allow you to run Windows on your Mac, and you can install SPSS for Windows within the virtual machine.
6. Dual Boot with Windows: If you have a genuine Windows license, you could set up a dual-boot system on your Mac, allowing you to boot into Windows when you need to use SPSS.
7. Seek Community Help: Sometimes, other users may have encountered and solved similar issues. Check online SPSS user communities or forums for advice and solutions specific to your problem.
8. Backup and Reinstall: As a last resort, you could consider backing up your data and performing a clean install of macOS Sonoma. Sometimes, this can resolve compatibility issues, but it's a more drastic step and should only be done after exhausting other options.

Remember to back up your data before making significant changes to your system or attempting a clean install. It's also important to verify the official system requirements and compatibility of your software with the macOS version you are using.