Apple announced MacOS 26 (Tahoe); updates for products are in progress. All current releases work on Tahoe, but testing is ongoing. Apps warn of insufficient testing. Test releases will launch soon, followed by full support later in the beta cycle. Check the Status page for updates and subscribe for more info.
https://weblog.rogueamoeba.com/2025/06/09/initial-notes-on-macos-26-tahoe/