Old School Runescape Won’T Open On Mac

Old School Runescape Won'T Open On Mac

Old School RuneScape Not Opening on Mac: Troubleshooting and Solutions

Nostalgia can be a powerful force, and for many, nothing quite evokes the memories of late ’90s and early 2000s gaming like Old School RuneScape. But what do you do when the game refuses to launch on your Mac? Don’t panic; this guide will help you troubleshoot and resolve the issue so you can embark on your retro adventure once more.

Common Causes and Solutions

Before diving into more complex fixes, let’s address some common issues that might be preventing Old School RuneScape from opening on your Mac:

  • Outdated Game Client: Ensure you’re using the latest version of the Old School RuneScape client. If an update is available, download and install it.

  • Firewall or Antivirus Blocking: Check your firewall or antivirus settings to ensure they’re not blocking the game. Add exceptions for the Old School RuneScape executable and client folder.

  • Insufficient Permissions: Verify that you have the necessary permissions to install and run Old School RuneScape. Check your user account settings and grant administrative privileges if needed.

Advanced Troubleshooting

If the basic troubleshooting steps didn’t resolve the issue, here are some more advanced solutions:

  • Disable System Integrity Protection (SIP): SIP can sometimes interfere with game installation and execution. Temporarily disable SIP and try installing and launching Old School RuneScape again. Remember to re-enable SIP after the game is running smoothly.

  • Launch the Client via Terminal: Open Terminal and navigate to the directory where you installed Old School RuneScape. Type the following command: “./OldSchool\ RuneScape.app/Contents/MacOS/jre11-headless-macOS/bin/java” -jar OldSchool\ RuneScape.jar

  • Run in Compatibility Mode: If you’re using an older version of macOS, try running Old School RuneScape in compatibility mode for an earlier operating system version.

  • Reset Java Preferences: Locate the Java Preferences file at “~/Library/Application Support/Oracle/Java/Deployment/deployment.properties.” Delete this file and restart Old School RuneScape.

  • Reinstall the Game Client: As a last resort, uninstall the Old School RuneScape client completely and reinstall it from scratch. This will ensure that any corrupted or missing files are replaced.

Expert Tips and Advice

  • Update Your macOS: Ensure your macOS is fully updated. The latest updates may include bug fixes or optimizations that can affect game performance.

  • Check for Graphics Card Drivers: Outdated graphics card drivers can cause issues with game compatibility. Update your graphics card drivers to their latest versions.

  • Disable Hardware Acceleration: Hardware acceleration can sometimes lead to performance problems. In the Old School RuneScape settings, disable hardware acceleration and see if the game launches.

  • Clear the Cache: Clear the cache of your web browser and Java caches. This can remove corrupted or outdated files that may be interfering with Old School RuneScape.

  • Contact Jagex Support: If all else fails, contact Jagex support for further assistance. They may be able to provide additional troubleshooting tips or help you identify the specific cause of the problem.


Q: Why won’t Old School RuneScape open on my Mac?
A: The issue could be caused by outdated software, firewall/antivirus blocking, insufficient permissions, or a corrupted game client.

Q: I’ve tried all the troubleshooting steps, but the game still won’t launch.
A: Contact Jagex support for further assistance. They may be able to provide specialized troubleshooting instructions based on your specific circumstances.

Q: Is it possible to play Old School RuneScape on Mac M1?
A: Yes, Old School RuneScape can be played on Mac M1 devices through Rosetta 2 emulation. Ensure you have the latest version of macOS and the game client installed.

Q: Why does Old School RuneScape keep crashing on my Mac?
A: Crashes can be caused by unstable internet connections, outdated graphics card drivers, or hardware acceleration issues. Try disabling hardware acceleration, updating drivers, or contacting Jagex support for further assistance.


Old School RuneScape is a beloved classic that many Mac users enjoy. If the game refuses to open, it can be frustrating, but it doesn’t have to ruin your gaming experience. Follow the troubleshooting steps outlined in this guide, and don’t hesitate to seek assistance from Jagex support if needed. With a bit of patience and technical know-how, you’ll be back in Gielinor in no time.

Do you have any experiences or questions about Old School RuneScape not opening on Mac? Share them in the comments below, and let’s discuss possible solutions together!