SystemExtr

SystemExtr is a macOS application that appears to cause problems for many users, judging by complaints published online. The majority of user reports mentioning SystemExtr say that this process is consuming a lot of memory and CPU resources, therefore causing the system to behave slower than usual. It would appear that the SystemExtr component might be linked to several applications, the majority of which are considered to be either adware or a Potentially Unwanted Program (PUP.) SystemExtr is not a legitimate macOS application and having it on your device is not recommended.

If you are experiencing issues with SystemExtr, we advise you to try and remove the source of the problem as soon as possible. The most efficient and secure way to prevent SystemExtr from running again is to use an up-to-date macOS security tool - this is guaranteed to eradicate all files linked to this application.