alternatively, for Terminal, set -o vi I also bind H to ^ and L to $ with bind -m vi 'H: vi-first-print' bind -m vi 'L: end-of-line' (not OS X specific, but

alternatively, for Terminal, set -o vi I also bind H to ^ and L to $ with bind -m vi 'H: vi-first-print' bind -m vi 'L: end-of-line' (not OS X specific, but related)