Use these methods -
How to delete Mac keeper malware manually .
Enter in System Library - Click on finder and take cursor on top menu bar , click on Go > computer > Macintosh HD
( a ) Applications - Mac keeper app
Click on library .
( b ) Launch Daemons
com.mackeeper.AdwareAnalyzer.AdwareAnalyzerPrivilegedHelper.plist
com.mackeeper.Mackeeper.MackeeperPrivilegedHelper.plist
( c ) PrivilegedHelperTools
com.mackeeper.Adware.AdwareAnalyzer.AdwareAnalyzerPrivilegedHelper
com.mackeeper.Mackeeper.MackeeperPrivilegedHelper
Enter in User Library - click on finder > Go > hold option key > Library , these are the locations where malware hide .
( a ) Application Support
Folder - com.mackeeper.AdwareAnalyzer
Folder - com.mackeeper.MacKeeper
Folder - com.mackeeper.Mackeeper.Mackeeper.Helper
Folder - Mackeeper - and its subfolder - statistic 2
Folder - Mackeeper 3 - and its subfolder - NE notifications
( b ) Launch Agents
Folder - com.mackeeper.AdwareAnalyzer.plist
Folder - com.mackeeper.Mackeeper.Helper.plist
( c ) Logs - Mackeeper.log
Mackeeper.log.signed
( d ) Preferences
com.mackeeper.AdwareAnalyzer.plist
com.mackeeper.Mackeeper.Helper.plist
com.mackeeper.Mackeeper.plist
( e ) Saved Application state
com.mackeeper.Mackeeper.savedstate
( f ) Caches
Folder - com.mackeeper.AdwareAnalyzer.plist
Folder - com.mackeeper.Mackeeper.Helper.plist
Folder - com.mackeeper.Mackeeper
These folders / subfolders and related .plist are dragged and dropped to the trash .
Also if the app is in download folder it is moved to the trash .
Restart the Mac from apple logo and empty the trash .
The name of mackeeper files could slightly differ , you can run https://etrecheck.com/
And post the results , also Malwarebytes anti malware for Mac is self sufficient and very much effective to remove mackeeper files immediately from Mac .