Remote Mouse app turns our iPhone, iPad into a wireless touchpad and keyboard for our computer. We can take control of our PC or Mac or presentations from anywhere in the room.

The first time that you use Remote Mouse under Mojave, you will be prompted to grant access. You can refer to this guide to use iPhone to control computer using Remote mouse. You can find the detailed instructions to authorize remote control app from System Preferences on Mac.
macOS Mojave has significantly enhanced the security & privacy protection, therefore it requires re-authorization when using Remote Mouse or a specific feature for the first time. If you have just updated the Mac system and Remote Mouse stopped working, try to re-authorize it again, this should fix the problem.
Here is how to authorize or re-authorize Remote mouse on Mac:
- Click the Apple Logo in the upper left corner of the Mac top menu bar, and select “System Preferences” from the drop-down menu.
- Select “Security & Privacy”
- Switch to “Privacy” tab and select “Accessibility” from the left pane
- Click the lock icon in the lower left corner and enter your Mac password to unlock it
- Click to add Remote Mouse to the whitelist