How to enable system extensions on Apple Silicon M1/M2/M3/M4 Mac?

When installing M3 BitLocker Loader for Mac on Apple Silicon M1, M2, M3, M4 Mac, you need to allow system extensions before reading/writing BitLocker encrypted drive.

It is a necessary step on M1, M2, M3, M4 Mac and won't lower your Mac security.

1. After installing M3 BitLocker Loader for Mac or any other programs requiring macOS kernel extensions, click Open Security Preferences when you see a System Extension Blocked pop-up.

If you inadvertently click the Ignore button to dismiss the pop-up, you can also find the Privacy & Security (Gatekeeper) settings in the Apple logo > System Preferences (or System Settings).

2. Scroll down to find the Security section and select App Store & Known Developers (for macOS Sonoma & earlier version, choose App Store and identified developers).

3. Click Enable System Extensions and enter your admin password.

4. When the pop-up shows "To enable system extensions, you need to modify your security settings in the Recovery environment", click the Shut Down button to turn off your Mac.

5. When your Mac is completely off, press and hold the power switch (Touch ID) until it says "Loading up startup options".

6. Click Options and then click Continue to boot the M1, M2, M3, or M4 Mac to macOS Recovery Mode.

7. Select Utilities > Startup Security Utilities from the top menu bar.

For macOS Sonoma & earlier version, choose Utilities > Startup Security Utility from the top menu bar.

8. When you see the startup disk, click on Security Policy...

9. In Startup Security Utility, choose Reduced Security and check the option: Allow user management of kernel extensions from identified developers.

Q: Is playing around with Mac's default security settings and enabling system extensions safe?

A: If the software you are installing requires reduced security for installing kernel extensions, it is safe. That's because only Apple-identified and trusted developers can ask you to allow system extensions. Their software will never compromise the overall system security.

10. Click OK, enter the correct admin password, and wait until the security level change completes.

11. Restart your Mac.

12. Go to the Privacy & Security window again, and this time in the Security section:

Click the Allow button underneath System software from developer "Chengdu Aibo Tech Co., Ltd." was blocked from loading.

If you have multiple system extensions to be enabled or updated, you will see the Details.. button instead, click it, and switch on the system extensions you want to allow, and click OK.

13. You will be asked to enter your admin password.

14. Restart your Mac to make the change take effect, and then finish the installation if needed.