vim - yank into register also yank to the default one after upgrading to MacOS Sierra -

if remember correctly, before updating, "+y yank system clipboard, not affect register p using.

after updating does.

this controlled clipboard option. see it's set to, run:

:set clipboard? 

this can have number of values, including combinations. if it's unnamed, p, y, etc. use * register. if it's unnamedplus, they'll use + register. there other values , combinations (see :help 'clipboard' (include quotes)).

it's yours set unnamedplus, or possibly combination (unnamed,unnamedplus, put in both * , +).

if don't want "+y affecting default p register, put in ~/.vimrc:

set clipboard=unnamed