Configuring Your Time Zone After a welcome screen, you will be prompted to configure your time zone. First select whether the hardware clock of your system is set to local time or Greenwich Mean Time (GMT or UTC). The time displayed in the dialog may help you decide on the correct option. Macintosh hardware clocks are normally set to local time. If you want to dual-boot, select local time instead of GMT. Systems that (also) run Dos or Windows are normally set to local time. If you want to dual-boot, select local time instead of GMT. Depending on the location selected at the beginning of the installation process, you will next be shown either a single timezone or a list of timezones relevant for that location. If a single timezone is shown, choose Yes to confirm or choose No to select from the full list of timezones. If a list is shown, select your timezone from the list, or select Other for the full list.