How can I open new Chrome window with different arguments?
nohup /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --disable-web-security 2&gt;&amp;1 &amp;


nohup lets you quit Terminal without killing the process.
Arguments are added as normal before the 2&gt;… redirection.

Alternatively, you can try:

open /Applications/Google\ Chrome.app --args --disable-web-security