Mavericks is a beautiful operating system, it's just that synchronization with a modern iOS device is very scuffed, sometimes Image Capture and iPhoto work, sometimes they don't, I can live with that. iTunes, however, just fails. It asks to unlock the device, then says "Permission Denied" (no error code, iTunes 12.6.2). I think that this problem is rooted in the version of usbd/usbmuxd that ships with Mavericks, it possibly doesn't support some messages that modern devices (iOS 26) send over the wire. If a newer version of usbmuxd were backported, it could possibly work. If it never works, i may just use iTunes 12 in a Windows VM and sync over that.