How to unlock my Mac with my phone

1. Apple Remote Desktop User Guide for Mac - Apple Support
2. Use Switch Control on your device to control another Apple ...

Use your iPhone, iPad, or iPod touch to control another device

1. 1. Connect your devices to the same Wi-Fi network.
   2. Sign in to iCloud with the same Apple ID on both devices.

• • • If you want to control a Mac, choose Apple menu  > System Preferences on your computer. 
    • Select Accessibility. In the sidebar, choose Switch Control. 
    • Check the checkbox next to "Allow platform switching to control your computer."

1. 1. If you haven't already, turn on Switch Control on your iPhone, iPad, or iPod touch.
   2. Use your switch to navigate the Switch Control menu. Select Device.
   3. 
   4. Select Use Other Device.
   5. 
   6. Select the device that you want to control, then select Connect. Now you can use the switch connected to your iPhone, iPad, or iPod touch to control the other device.