There is a specific sequence of events to get rid of Mac Tonic...
1)Do not scan anything. there is a place to say NO THANKS and close the program.
2)go into applications and look for the program. Dump it in the trash
3)your going to go to the library folder thats in your home folder, not the library folder you find on the same level as your hard drive. If you don't see the library folder in home folder, while in finder, go up to VIEW, SHOW VIEW OPTIONS, check the box SHOW LIBRARY FOLDER. In Library, open folder APPLICATION SUPPORT. In there open folder MCR.
(or while in finder go to menu bar's GO, GO TO FOLDER, ~/Library/Application Support/MCR and hit go)
4) find mchlpr file in the MCR folder, right click, send to trash.
5)empty your trash
6)go to System Preferences (gear icon)
7)Go to users and groups, unlock the admin account and click on LOGIN ITEMS next to password. Locate Mac Tonic and click on the minus button. If you see other suspicious items, remove them. If you don't know what something is, look it up or leave it alone.
8) Reboot, its gone
Now optional step 9. This is controversial, but only here in the apple discussions. You have people in here who do not live in the real world like you do jloSF.
The days of Macs being immune to malware have been over for sometime, to the dismay and DENIAL of many on here. However, a simple google search of "do I need antivirus on my mac OS" will tell you all you need to know. There are several, but I have found a simple one that does NOT take up a lot of resources, its practically invisible.Thats Avast, although the AVG is not bad either. you don't need an antivirus for a mac, but too many people download and install these 'speed up your mac' software like MacKeeper, and they get stuff like MacTonic. Your Mac can protect itself when default settings are present, but in the real world, people change the default settings. Changing the protection so you can install software not approved, or disabling SIP to put on or run something you want.. these things circumnavigate the Macs built in protection. Plus, your a human being, not a robot. You make mistakes.
Download and install 'AVAST FREE for Mac' by doing a google search for whats in parenthesis. Don't get it from 3rd party site, look for the avast site and get it from there. and if you see posts from people who will say your mac doesn't need antivirus, there are no viruses on Macs, just remember why you came here, and remind them too.
Note to apple moderators: My advice to run antivirus, is parallel to the advice & recommendation of leading Mac periodicals, and at least 3 or 4 Malware removal companies who sell software with Apple Developer Program Licenses. If another one of my posts advising my opinion to run an antivirus program for people who have been affected by malware is removed, I will take it up with Apple directly.