HOW TO DISABLE SYSTEM INTEGRITY PROTECTION (SIP) OF YOUR MAC?

1) POWER OFF YOUR MAC

Turn off your mac through the normal shutdown option in the macOS system

2) HOLD ⌘+R

Hold ⌘+R to boot into Recovery Mode of your mac.

3) OPEN TERMINAL

Open the terminal ( Utilities > Terminal)

4) RUN COMMAND

Enter "csrutil disable" without the quotes and press enter...

5) REBOOT

Reboot into macOS and run MagicClock again...