If you encounter an error saying the "Install OS X application can't be verified," it’s likely because the system date is set too far in the future. You can fix this by opening Terminal from the installer and using the date command to set it back to a time closer to 2010.
While the standard OS is "keyless," there are two specific scenarios where you might go hunting for a number: Do I Need A Serial Number To Install Snow Leopard
: Occasionally, if you call Apple Support to order replacement recovery discs, they will ask for your Mac's hardware serial number (found on the bottom of the machine or under "About This Mac") to ensure they send the correct version for your specific model. Why People Get Confused The confusion often stems from two places: If you encounter an error saying the "Install
Do you have the , or are you trying to create a bootable USB from a downloaded image? Why People Get Confused The confusion often stems
If you have your disc or image ready, here is how you proceed without a key:
: If you want a fresh start, use Disk Utility from the "Utilities" menu to erase your drive (format as Mac OS Extended Journaled ) before installing.
: While the OS is free of keys, professional Apple software from that era (like Final Cut Studio or Logic Studio ) did require serial numbers. Installation Quick-Start