How to change timezone in recovery mode? I have a MacBook pro and I'm trying to instal OS X El Capitan on a clean formatted SSD hard drive. While installing I encounter an error saying "this copy of the instal os x el capitan application can't be verified...". After some search in the internet I realized the problem is due to date and time being not correct. I corrected the time but I couldn't find a way to change the time zone because whenever I type "systemsetup" command I receive the "command not found" error.
I will be more than happy if anyone can help me with this problem.
Thanks
As suggested by this answer, try setting the date to one earlier than the current date. The timezone should not matter at the time of installation.