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Re:Quick tip for developers who use OS X by joshweinstein on Tuesday January 14, 2014 @12:31AM (#7055556)
I've been wanting to use 'jj' to enter normal mode on the command line for some time. This solution actually didn't work for me, but adding the following to my .zshrc did:

  bindkey -M viins 'jj' vi-cmd-mode
Re:Quick tip for developers who use OS X by bilalq on Thursday January 16, 2014 @12:04PM (#7070627)
That is because zsh does not make use of readline. I ran into this issue myself recently, since I use bash on my personal machines and zsh on my work ones.
Re:Quick tip for developers who use OS X by danielrm26 on Saturday January 18, 2014 @10:42AM (#7081198)
Super off-topic, but I bet you'd be far happier if you used only one.