If you're experiencing issues where your iPhone is not appearing as a device on your Mac, there are a few things you can do to remedy the situation. First, make sure that your iPhone is connected to the same network as your Mac. If it's not, you'll need to turn on AirDrop on your iPhone and then open Finder on your Mac. From there, select AirDrop from the list of devices and click Continue. Finally, copy the link address for your iPhone and then paste it into the text field next to Show in Finder:If that doesn't work, you can try resetting your iOS device by going to Settings > General > Reset > Reset All Settings.