How does one switch between windows on VIM?
Control+W followed by W to toggle between open windows and,
Control+W followed by H/J/K/L to move to the left/bottom/top/right window accordingly.
Control + W twice does the trick for me on Macbook Pro.
Its possible to remap this to a more convinient keys instead of the annoying Control+W
in .vimrc
nnoremap <C-J> <C-W>j
nnoremap <C-K> <C-W>k
nnoremap <C-L> <C-W>l
nnoremap <C-H> <C-W>h
now control + h/j/k/l will move around the windows