- Reinstall Mac Os Error A Required Download Is Missing
- Mac Os X A Required Download Is Missing
- Required Download Is Missing Mac Os High Sierra
Just download the Install Mac OS X Lion app from the Mac App Store and let it walk you through the remaining steps. Still, things can—and occasionally do—go astray. I Had to replace the HDD(mid 2012 model) in a MacBook Pro as when the MacBook booted up it came up with a prohibited sign and even after wiping that HDD and repairing it etc it wouldn’t install the OS through internet recovery. This HDD I put in as a replacement is from 2010 so it doesn’t have internet recovery.
An installation error occurs sometimes for when upgrading from OS X Snow Leopard to OS X Lion “Can’t download the additional components needed to install Mac OS X” – Check your network configuration as the install needs to pull down software over the internet.
But the network configuration is OK.!
Check that Software Update can connect directly to Apple Software Update Servers not a custom internal one, remove any Managed Preferences if it is a managed host.
Option 1
If that still doesn’t get rid of the message I have found on a device that the drive needed to be reformatted – the only thing different about the drive I was trying to install to was that it had a Boot Camp partition on it The Boot Camp partition might be a red herring but certainly reformatting the disk solved the issue.
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- clone the main HD drive to an external disk use CCC – link below
- boot from the external
- erase/reformat the main HD – use HFS Extended Journaled
- clone back the main HD from the external
- reboot from the main drive
- run the installation upgrade again
This time – no problems.
If you don’t care whats on the disk just erase it and run the upgrade, I wanted to keep all the data intact in my example, hence the clone back.
Cloning courtesy of the fantastic bombastic CCC.
Option 2
Another potential solution is to remove any RAM over 4GB run the install and then put the additional RAM back in after – even then try and limit the RAM slots to one, so not 2GB in each – rather 1 slot with 4GB.
I have two iMac (27-inch, Mid 2011) running OS X Yosemite 10.10.5 which I am trying to restore to factory settings before I dispose of them.
I have deauthorised them from iTunes, they aren't signed in to iCloud or iMessage. I have restarted them in MacOS Recovery and have the OS X Utilities control panel open. I have two questions from this stage onwards: Itunes 10.6 3 mac download.
A. To erase the hard drives I select Disk Utility > Continue but I'm not certain which disk/volume to erase. The choices are:
1 TB ST31000528AS Media
Reinstall Mac Os Error A Required Download Is Missing
OSX
SuperDrive
----------------------------------
disk1
OS X Base System
Mac Os X A Required Download Is Missing
My guess would be OSX, being the only volume on the hard drive. And that disk1 is the recovery drive and should not be erased.
B. Then to reinstall OS X, I select Reinstall OS X, click continue on the Install OS X dialogue box, receive a message that reads 'To download and restore OS X, your computer's eligibility will be verified with Apple', click continue, then receive a message that reads 'A required download is missing'
Can you provide any guidance regarding A. and B. above?
Required Download Is Missing Mac Os High Sierra
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