Vim using <c-6> to switch alternative file is not functional on Mac terminal while MacVim works.
The current version of Vim is 7.3.
To switch to the alternate file you can use control-shift-6 (<C-^>) or :e #. Both of these work in the Terminal.
Take a look at :h CTRL-^
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With