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Malwarebytes for Mac 4.5 beta

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Posted (edited)

We're pleased to announce the availability of the Malwarebytes for Mac 4.5 beta! This beta replaces the kernel extension with a system extension using Apple's new EndpointSecurity framework. This may not mean anything to you, but the bottom line is that it replaces an outdated technology that Apple wants to eliminate with a new one that has the full support of Apple. As far as you're concerned, from a user's perspective, there should be no noticeable difference in how the software works.

Note that this is not yet tested for compatibility with Big Sur, and will not install there. (There are still weird bugs in the Big Sur betas, so we're not comfortable installing there until things have stabilized.) If you're interested in testing on Big Sur, please do so in a virtual machine. You can do so by installing on a Catalina VM and upgrading that VM to Big Sur.

Reporting issues

Any issues found can be reported by starting a new topic on this forum. Please include:

  • macOS version
  • a description of the issue
  • steps required to reproduce the issue
  • screenshots, if applicable

We would very much like to hear feedback about the following:

  • Does real-time protection work as expected?
  • Do manual/scheduled scans work as expected?
  • Do you have any issues allowing the system extension to run?

To test scans and RTP, you can use an EICAR file placed in the following folder:


This is the only place where Malwarebytes for Mac will detect an EICAR file, but the file may be given any name. The "Malwarebytes" folder will need to be created manually by you.

We are interested in both testing in Catalina, with the new system extension, and in Mojave and earlier, to ensure nothing has broken on older systems with the kernel extension.

Installing the beta

To download the beta, simply open the existing Malwarebytes app on your computer. (You can download and install it if you don't already have it.) In the app, click Settings, then turn on the Beta Application Updates setting. Then, in the Malwarebytes menu, choose Check for Updates, and install the update.


Edited by AlexSmith
Fixed color formatting

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