Hi, this is my first post here so apologies for any mistakes.
I have a MacBook Air 13" 2015 that is currently running MacOS Mojave. However, for miscellaneous reasons, I want to downgrade it to OS X Mavericks. However, when I bought my Mac, it was running OS X El Capitan, and I bought it brand new from the store. Is it possible to downgrade to OS X Mavericks, and if so how? I have tried a method before, but when I booted my Mac, it came with a circle with a line through it, meaning something is wrong. Any answers will be appreciated.