alias cchrome='/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --user-data-dir="/tmp/chrome_dev_session" --disable-web-security' code example

Example 1: open chrome without web security mac

open -n -a /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --args --user-data-dir="/tmp/chrome_dev_test" --disable-web-security

Example 2: macos chrome disable web security

$ open -a Safari
or 
$ open -a "Google Chrome" --args --disable-web-security