Troubleshooting Wake On LAN on a Mac
Here are some steps you can take to troubleshoot issues when trying to wake a Mac.
- The computer you are trying to wake up must be on a wired connection (not on WiFi)
- A second Host computer must be switched on and in the same network in order to send the wake request
Important: Make sure you are using up to date, officially supported third-party technology together with the host software. The host software is designed for use with third-party products and services (browser, OS, etc.) that are officially supported by their respective vendors and well-maintained by the end user (latest patches and updates installed). Learn more
First, confirm that you meet the hardware requirements for using Wake on LAN:
- Confirm that the computer is on a wired network (not WiFi). Wake On LAN is not supported for Mac hosts on a wireless network.
- Make sure the host is in Stand-by, sleep, or hibernation (ACPI specification S3 or S4) mode.
- You cannot wake a Mac that is powered off.
Adjust the Power Management settings in a System Configuration file
Check the Power Management settings on the Mac you want to wake up.
- Open Finder.
- Navigate to SystemConfiguration by going to Go > Go to folder and typing /Library/Preferences/SystemConfiguration/.
- Open the following file: com.apple.PowerManagement.plist.
- Set the <integer> Wake On LAN </integer> value to 1 for the following <keys>:
- <key> AC Power </key>
- <key> Battery Power </key>
- <key> UPS Power </key>
- Restart the Mac.
Result: Wake On LAN should be available.
Adjust the Power Management settings in Terminal
- Open Finder.
- Navigate to Terminal by going to and double-clicking on Terminal.
Result: The Terminal window is displayed.
- Type pmset -g live.
Result: A table with settings and values is displayed.
- Look for the value womp and verify that it is set to 1.
Result: If it is not set to 1, you can set it with the command sudo pmset -a womp 1.
Further Resources and Information
Make sure the host is in Stand-by, sleep, or hibernation (ACPI specification S3 or S4). You cannot wake a Mac that is powered off.
ACPI (Advanced Configuration and Power Interface) standards:
- S0 – System is fully powered on
- S1 – Power on Suspend(POS): Power to the CPU and RAM is maintained.
- S2 – CPU powered off.
- S3 – Standby, Sleep or Suspend: RAM still has power
- S4 – Hibernation: Memory is saved to the hard drive and the system is powered down.
- S5 – Shut Down: The power supply still supplies power to the power button.
For additional information, visit the Apple support site.
Article last updated: 27 September, 2022