Hello few weeks ago I updated my iMAC SNC02TK6Y2J1G5 after this it become very-very slow, in order to make it faster I have to keep most of the app (like..Chrome, mail, whatapp....) closed otherwise it is very slow. Also I noted when my wife switch the PC in her username without log me off will take forever to her to open any app or use it.... This is crazy how we made worse with the last updating (in macOS Big Sur).....Any way to make better this situation because like this Im not able to work anymore with my PC. Thanks .