I've never run any Windows software. I don't recall downloading any either.Do you have CrossOver on your Mac? Perhaps running Windows software through CrossOver or wine wrapper?
This is my concern, following on from my Malwarebytes thread.That's not a Mac application. If you didn't install that, it might be malware.
Click on the "Open in Finder", then right click on the SoftwareUpdater and choose open with text edit (or your favorite text editor). Then post the contents of the script.
Perfect. I too was getting redirected and Malwarebytes fixed it a week or so ago. Safari is running great now, so I guess Malwarebytes fixed it but this is left over. I'll delete it now.