Which means, you can just enter it exactly like this: date -uĮnter the command and hit return. To avoid trouble with timezones, we will use UTC time instead (). Below you see what the command should be for your current time and date –. This command will be entered as follows: date -u Įvery bracket should be replaced with a two-digit number based on UTC time. For some reason, it might have been reset to 2001, in which case we need to set it to the right date. The result of this command will be the date that the system currently has been set to.

Once in the terminal enter the following command and hit return/enter: date You can check this by going to utilities and opening the terminal. Now, if you haven’t used your Mac for a while, the error might be caused by an incorrect system date setting.

When you’re booting your Mac from the recovery partition and are planning to reinstall OS X, you might be met by the following message:Īn error occurred while preparing the installation. March 2013 Changing system date from Terminal – OS X recovery Select Recovery HD from the Startup Manager.įor detailed information on this update, please visit: About OS X Recovery Disk Assistant.18. To access OS X Recovery, reboot the computer while holding the Option key. When the OS X Recovery Disk Assistant completes, the new partition will not be visible in the Finder or Disk Utility. Insert an external drive, launch the OS X Recovery Disk Assistant, select the drive where you would like to install, and follow the on screen instructions. To create an external OS X Recovery, download the OS X Recovery Disk Assistant application. Note: In order to create an external OS X Recovery using the OS X Recovery Assistant, the Mac must have an existing Recovery HD. The OS X Recovery Disk Assistant lets you create OS X Recovery on an external drive that has all of the same capabilities as the built-in OS X Recovery: reinstall Lion or Mountain Lion, repair the disk using Disk Utility, restore from a Time Machine backup, or browse the web with Safari. Built right into OS X, OS X Recovery lets you repair disks or reinstall OS X without the need for a physical disc.

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