how to downgrade(erase catalina)

[kinxsize]

Hi there after fresh instalation of catalina few things doesn't work like it should be. Is there a chance to go back to system i had before Os sierra? I have no time machine runs before. I have tried to make bootable usb installer of sierra but from catalina it not possible i guess. I try the method typing in a terminal.
Any ideas?

 

[kinxsize]

Ok i have done it!
After few try i have finally manage to install OS X el Capitan over an Catalina system which wasn't really working well on my mac. I have made a bootable USB of the system and erase hard drive with Catalina install fresh el Capitan with no problem.
Thanks

 

[nickdalzell1]

Back when I updated to Mavericks from Mountain Lion on my old 2012 MBP and hated the changes, I did a full wipe/reset. There's a recovery menu of some sort that restores any Mac to the out-of-box OS by wiping the hard disk and downloading everything from the internet. I don't recall how I did that but it did allow me to get Mountain Lion back.

I wish there was a way to do the same on an iPhone--boy if I could have wiped and gone back to iOS 6 when iOS 7's ugly came out!