Since Malwarebytes will no longer work on my mac because of some leg extension is there another malware protection I should use?

See the following from https://support.malwarebytes.com/hc/en-us/articles/360045251654-Legacy-System-Extension-warning-on-Malwarebytes-for-Mac-devices

If you are running Malwarebytes for Mac version 4.5.14 you will no longer see this message. All you need to do is update to the latest version of Malwarebytes for Mac, and verify automatic updates are turned on.

• To update, see our Upgrade to the latest version of Malwarebytes on Mac device article.
• To verify automatic updates are turned on, see our General settings in Malwarebytes for Mac v4 article.