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What is Legacy System Extension mean?

Hey Scotty, when we met a couple of weeks ago to try to find my missing papers, you did a cleanup of some malware files. Today I received a message and took a screen shot (below) to see if I need to so anything about it. I eventually will have to click “ok” to get rid of it, but wanted to see if there is anything else I need to do.

Image 12-17-20 at 3.49 PM
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Messages like this one have been a very big pain in many Mac user's sides for the last several weeks now. First, it's not malware or anything that will harm your computer even though Apple often words the messaging as such. Instead, Apple is doing a poor job of telling you that some software on your computer is or will soon be out of date and you just update it. This is due to several possible reasons but the most likely reason is the following:

Any piece of software that Apple allows to live on your computer should be "signed" by Apple. These signatures (invisible files that live on your computer that basically vouch for the software saying it's cool) can expire. When they do Apple then presents a freak out screen like this one. Most recently they've done this to HP printer drivers. "HP pinter driver xyz will harm your computer and is malware". Again this is just a poorly worded message on Apple's part.

In this case, they are taking issue with the software "Malware Bytes" and letting you know it is expiring or becoming outdated in Apple's eyes. You will often see this type of message after an update or upgrade of your computer's software. In some cases it's a pain to deal with where you might have to fully remove all the components of the older software before installing a new version but most of the time, just going to the Mac App Store and redownloading it will resolve the issue.

Again, this is not malware or a virus. This is Apple telling you the program called Malware Bytes is becoming outdated.
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