![]() Use the comments form to let us know if you have issues or found another way to bypass this error. Try re-downloading El Captain and re-copying it to your media. The El Capitan license agreement will display. You may actually have a corrupt copy of El Captain in the end – maybe you disconnected your USB Jump drive incorrectly causing the files to become corrupt. Perform a Clean Install of OS X El Capitan In the Install OS X window, select Continue. The install should kick off and you’ll see in Terminal “installer: OS Install started”. installer -pkg /Volumes/Mac\ OS\ X\ Install\ DVD/Packages/OSInstall.mpkg -target /Volumes/Macintosh\ HDĢ. Type the following command into Terminal, replacing with your Volume names. Right after you boot El Capitan the setup process will start. You can do this while still booted from your USB Drive or media. Install OS X El Capitan on the internal drive and reboot the Mac. 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 All the installer needs is in that image and the file name has always been the same since Lion at least. Either right click on the pkg or the app, show contents, find the InstallESD.dmg file and restore that to an usb with the tool of your choice (disk utility, image restore, diskutil). Performing a clean install on a separate drive or partition. You don’t really need to execute the installer app. If it’s not correct, continue with these steps.ģ. Before you begin the Lion installation process, back up your existing OS X system and user data. You can do this by creating a bootable El Capitan installer, and then use it as the boot drive for. If your date is correct, then proceed to the next section below. A clean installation is when you install the operating system on a blank storage device. Cancel out to the installation (If you are still on your bootable image of El Captain). The following method allows you to download Mac OS X Lion, Mountain Lion, and Mavericks. Check the date to ensure it’s right – follow these steps.ġ. This happens if your onboard motherboard battery is toasted. In the last 6-12 months they have all stopped working. ![]() Have been using them with no bother for the past 5 years. This will complete the install over the previous OS and once it finishes, doing the clean install becomes easier. ![]() I have had a collection of various versions of OS-X installs set up on USB sticks. First, start by installing OS X 10.11 El Capitan from the Mac App Store. If you are installing mac os on a fresh Hard Drive then rather pressing. Everyone 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. Does anyone know why its becoming nearly impossible to do fresh installs of OS-X on older Mac Systems. Disk Images Apple disk image and osx base system appeared in the left column. ![]()
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