Highlight your legacy index file ( iTunes Library.itl ) and click to initiate automatic database translation. 🎛️ How to Sync and Backup iOS Devices Without iTunes
For users who desperately need the app management features, there is a specific legacy version of iTunes that is often discussed: itunes macos big sur 11.7
Then staying on Big Sur 11.7 is a smart move. Just accept that the name "iTunes" is gone. Highlight your legacy index file ( iTunes Library