Remove legacy SpyBusterExtension on MacBook Pro M4?

I ran EtreCheck to find out why I am having application memory issues on my MacBook Pro M4 and found some legacy system extensions that have no current application but are running in the background. Is there any way to find them, remove them completely?


 [Running] SpyBusterExtension - version 2.9.51 (MacPaw Labs LTD)

        Application: Not found!

        Description: Detect potentially unwanted software

MacBook Pro 14″, macOS 26.1

Posted on Jan 2, 2026 7:21 AM

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20 replies

Jan 3, 2026 2:51 PM in response to HWTech

THANK YOU ALL for the help. I have been a Mac User since 1986 and so I have a lot of legacy stuff in the system which I have tried to clean out. The old way was to dump in the trash, but it left junk behind that was harder to remove. For about 5 years or more I have used AppDelete or something similar that got the legacy junk. I have cleaned and rebooted and will test from here, as well as update to Tahoe 26.2 tonight.


Thanks again.

Jan 4, 2026 12:33 AM in response to Jefferis Peterson

The good news is that modern applications do not need to use an installer anymore and all those remnant files can be included in the app bundle, so deleting the app is all that is needed, as long as developer adheres to that method. I now try to refrain from using any installer and being presented with an installer makes me think twice about if I really want this app to install files in other locations on my computer. Not all developers are on board yet, but the ones that are simply have you drag their application into your Application folder. With those there is no need for an uninstaller to remove them and dragging the application to the trash also removes any files that would have been installed in the System folders.

Jan 4, 2026 8:16 AM in response to Owl-53

Owl-53 wrote:

" Third time is a Charm " is a popular saying meaning that the third attempt at something, after two previous failures, is likely to be successful, expressing hope and luck for that final effort

Though, being retired since 2007

Have all time in the world to hunt down all the offenders and try to remove them 😎


Searching for app dependencies and for dangling app bits is a slog, even when getting paid to slog.


And for apps not distributed as bundles, removal tools can be hit-or-miss. If the app provides removal tooling.


And add-on third-party removal tools can themselves be a compounding error.


I’ve one install I’m dealing with going back to OS X 10.5 and Intel x86-32 circa 2007, and when that person finally goes to Apple silicon likely this year, it’ll get the nuke-and-pave.

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Remove legacy SpyBusterExtension on MacBook Pro M4?

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