If you recently upgraded to macOS 26 Tahoe and Horos stopped working for you, please follow these instructions to begin using Horos again:
1. Go to the Horos download page
here.
2. Download the 4.0.1 version of Horos
3. Horos should work again
This has worked for nearly everyone having issues following the upgrade. Please help us to share with anyone having issues.
We appreciate the Horos community!