I’ve just updates my MacBook Pro to High Sierra. Relatively painless, but on completion I found that Avast wasn’t working, wouldn’t update or scan. Only thing I could think of trying was to uninstall and then reinstall Avast. Uninstalling proved difficult but I finally got there. Carried out a thorough search and could find no Avast files remaining.
So, I downloaded the latest version of Avast and tried to install, but got a message telling me Avast was already installed and I needed to uninstall it first. Used the Uninstall tool that came with the download and tried again, and again, and again… No joy, it’s still there. Looked hard for any Avast files on the Mac but nothing I can find.
ecb1000, That looks like terrible experience! Would you mind to help us to solve it with a bit more details?
what did the Avast UI say when you’d found it wasn’t working? Was there any message / error shown?
how did you Uninstall? A) from app menu > Uninstall Avast B) d’n’d of the Avast from Applications to Trash C) some other way?
lets check if there are any leftovers Avast AV installs - please open the Terminal and run following commands
a) ls -la /Library/Application\ Support/Avast/
b) ls -la /Applications/Avast.app/
c) kextstat | grep avast
there should be some logs about Avast’s install/uninstall process in the /tmp directory. Would you mind to send them to me - hasik (at) avast (dot) com
restart your Mac, it helps sometime. - but please check 4) first otherwise the /tmp will be cleaned on restart
to manually uninstall Avast, you need to run following commands in Terminal
sudo rm -rf /Applications/Avast.app this will remove our UI part of the application
sudo rm -rf /Library/Applicaiton\ Support/Avast this will remove our configuration files and other data files
sudo rm /Library/LaunchDaemons/com.avast.* this will remove our system-wide registration files
sudo rm /Library/LaunchAgents/com.avast.* this will remove our per-user registration files
rm ~/Library/Application\ Support/Avast this will remove per-user configurations
reboot
Now the system should be clean from Avast and you should be able to install the latest version.
Hi,
I’ve made a mistake by sending Avast to trash. So I followed your instructions to to get rid of all Avast files and after that I removed all Avast files I find in my Mac. But trying to install Avast Security Online I’m getting a message saying that Avast can’t be installed because it’s already installed and I have to uninstall it in first place. So, as I do not know how can I surpass this problem I would like to ask you a suggestion to have it installed.
Thanks in advance, Francisco
So I ran the commands that you guy’s gave and none of them worked. The only script that did worked was when I typed this in and it did gave information. So The thing is I am new to mac and I tried Re-Install the program from putting it to trash.
im also unable to install avast and i tried those on terminal but they don’t work either and sometimes they ask for a password but im not sure on what the password is
Hey, So when you said you don’t know the password try to use your apple ID Password or the the password that you have to unlock your mac and see if you still having that password issue. Then tell me what you got on your results on from the command.
