Issue 5: macOS Mojave Crashes or Fails to Start Click First Aid and then Run to check the drive for errors. Use Disk Utility: On the macOS Utilities window, select Disk Utility and then the startup drive.Boot from Recovery Drive: Hard restart the Mac and immediately press and hold Command + R keys release them once the Mac chimes or the Apple logo appears.Issue 4: macOS Mojave Does Not Show Desktop after Startup Connect the battery and press the power button again to turn on the Mac. On Mac with a removable battery, remove the battery then press and hold the power button for 5 seconds to reset SMC.On MacBook, MacBook Air, or MacBook Pro with a non-removable battery, force shut down the Mac, press and hold Shift + Control + Option + Power Button for 10 seconds, then release all the keys to reset SMC.Reconnect the power cable and press the power button again to turn on the Mac. Reset System Management Controller (SMC): On iMac, Mac mini, or Mac Pro, disconnect power cable then press and hold the power button for 5 seconds to reset SMC.Wait for macOS Mojave to reset NVRAM and PRAM. Reset Non-Volatile RAM & Parameter RAM: Hard restart the Mac and instantly press and hold Option + Command + P + R keys until you hear the second chime.Issue 3: macOS Mojave Does Not Start/Boot Wait for a few seconds, and then press the power button to turn on the Mac. Hard Restart: If your Mac stops responding, then press and hold the power button until the device is forced shut down.Issue 2: macOS Mojave Stops Responding at the Startup Laptop Users: Connect the charger to your Mac and press the power button.Replace the faulty cord if required, then press the power button.
Desktop Users: Check the power connection, switch, and the power cord.