install os x el capitan on external drive

INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE HOW TO
INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE MAC OS X
INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE INSTALL
INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE MAC

Type the following command into Terminal, replacing with your Volume names. You can do this while still booted from your USB Drive or media.

INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE INSTALL

If your confident the install you just downloaded from the App Store is valid, just use Terminal to force install it. If it still fails with the same error message, proceed to next steps below.įorce Install El Captain Terminal Command In Terminal, type the following command in this format shown in example below date MONTH(02)-DATE(28)-TIME(01:51pm)-YEAR(15) date 0228015315 If it’s not correct, continue with these steps.ģ. If your date is correct, then proceed to the next section below. Cancel out to the installation (If you are still on your bootable image of El Captain). Check the date to ensure it’s right – follow these steps.ġ. This happens if your onboard motherboard battery is toasted.

INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE MAC

Follow the steps below.Įveryone Says: Check the System Time on MacĪpparently, the system time on your Mac may be off causing the El Captain installer to think your system date is way off.

INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE MAC OS X

You can still push forward and install Mac OS X El Captain. It basically means Mac OS X will not proceed installing a copy of El Captain because it can’t prove its authenticity – even if the installation is ok. This error message indicates the MPKG mechanism for checking the application installer checksum (used for proving the install files are valid and from Apple) files failed. It may have been corrupted or tampered with during downloading. This copy of the Install OS X El Captain application can’t be verified. Tags: El Capitan beta go back to Yosemite OS X 10.10 Yosemite Revert to OS X 10.If you are trying to install a fresh copy of Mac OS X 10.11 El Captain after downloading it from the App Store and you are using a bootable USB drive, you may receive an error message right before the install kicks off. If you would like to backup your iPhone/iPad/iPod to Mac before jailbreaking, you can just simply have a try Syncios Data Transfer for Mac. To avoid losing important data, it is very necessary to backup all important files to your Mac so that you can easily get them back whenever you lost them. You can follow Syncios on Twitter, Facebook for more tips and tricks. Once your Mac has been erased, you can install the Yosemite from your Bootable Installer now.Ģ) Select Install OS X, click Continue, and follow the installation process.ģ) If you have made that back up before you installed El Capitan, you can connect to your Time Machine drive and to restore all your files from the back up.

INSTALL OS X EL CAPITAN ON EXTERNAL DRIVE HOW TO

How to install Yosemite from a Bootable Installer This way you can do a clean install of the OS and restore any data you have in your backup. Using a bootable installer drive is necessary because you need to erase the drive on your Mac (including all traces of El Capitan) before installing Yosemite. You’ll need at least 8GB of storage available on an external drive, that is formatted with a GUID Partition Table, on which to put the installer and make a bootable OS X Yosemite install drive. Once the installer downloaded, it will launch automatically.Īt this point, you need create a bootable installer on a separate hard drive. Step 1. Download the Yosemite installer from the App Store. Next, you should create OS X Yosemite install drive now. Select Mac OS Extended (Journaled)* from the **Format list, if it isn’t selected already.Type in Macintosh HD for the name (or whatever you like.).Click on Disk Utility in the OS X Utilities selector.Hold down Command+R while your Mac reboots.Make sure your Mac is connected to the internet over W-Fi or Ethernet.If not, you’ll need to erase OS X El Capitan first, and then re-install.

If you made a bootable OS X Yosemite install drive before you went on the El Capitan beta, then simply plug it in, reboot, hold down the Option key, and you’ll be on your way. If you updated your Mac to OS X El Capitan, but aren’t too fond of the new version and would rather downgrade to OS X Yosemite, following post will demonstrate you how to move back to Mac OS X Yosemite from El Capitan.

Install os x el capitan on external drive