How to fix Razer Synapse when it crashes or fails to start

Updated: 07-May-2026 | Answer ID: 1917

This answer will show you how to fix Razer Synapse 3 when it fails to start.

Applicable Product:

The following factors are some of the possible causes Razer Synapse crashes or fails to start:

You can view the video below for instructions or review a copy of the video transcript.

Follow the detailed instructions below fix Razer Synapse when it crashes or fails to start.

Important:

Check your firewall or antivirus software configuration to ensure it is not blocking the app.
Ensure your system specifications have met the requirements.

Select a Razer Synapse version

Perform either one of the following to fix the issue.

Log in using your RazerID.
1. Go to “Launchpad” and type “Razer” in the search bar.
2. Click the app to launch.
3. Click "LOG IN".
4. Enter your email address and password then click “LOG IN”.
Ensure “Razer” is not running at 0%.
1. Press “command” + “space” to open Spotlight Search.
2. Type “Activity Monitor” and press “Enter”.
3. Check the CPU consumption for RazerAppEngine.
4. If the issue persists, perform a clean reinstallation of Razer Synapse for Mac. See the answers below for more details.
  - How to install Razer Synapse for Mac
  - How to uninstall Razer Synapse for Mac

Perform either one of the following to fix the issue.

Log in using your RazerID.
1. Right-click on the Razer Synapse icon in the system tray and click “Log In”.
2. Click "LOG IN".
3. Enter your email address and password then click “LOG IN”.
Run Razer Synapse as administrator.
Check your anti-virus and ensure “RazerAppEngine” is not blocked and excluded from it.
Ensure “RazerAppEngine” is not running at 0%.
1. Open Task Manager.
2. Check RazerAppEngine’s CPU consumption under Processes.
If the issue persists, perform a clean reinstall of Razer Synapse. See the answer below for more details.
- How to re-install Razer Synapse on Windows.