However, it seems not all apps are updated to support Mojave and you have to wait.

Best Cleaner Mojave Download And Install

You can download and install CleanMyMac full version for Mojave.

After then, you can authorize CleanMyMac to access apps or disks.

Its all up to you.

Best Cleaner Mojave Full Disk Access

No matter what kind of permission you give CleanMyMac, you need to click the Full Disk Access or other apps in the Privacy list.

Somehow, some times it is not easy for individuals to distinguish the versions and do not know which one is the suitable one to use.

Actually, there are alternatives to CleanMyMac for Mojave and even the latest Catalina.

It is designed for individuals to clean up Mac with simple clicks.

The software is updated to be compatible with all widely used macOS, including Mojave and Catalina.

The program only scans your Mac for junk files, bash history, trash files, and mail attachments.

When it finished, you can see the total junk file size on the left panel and the file size for each junk file on the right side.

And then, click the Clean Junk button at the bottom of the window.

However, if you download CleanMyMac for Mojave, please remember to set up system preferences first.