Boot Mac Os X



Boot

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.

HFSExplorer is a free tool for accessing Mac partitions from within Windows, but it’s read-only so it won’t help you here. Write to Windows NTFS Partitions From OS X. Your Windows partition appears under Devices as BOOTCAMP on Mac OS X. Unfortunately, Mac OS X can only read this partition out of the box, not write to it. OS X will automatically continue installing onto the external hard drive rather than booting up to your internal version of OS X. At the end of this article, I’ll show you how to boot up to the external hard drive, so skip down if you ended up using the App Store method.

Boot Mac Os X From Usb

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.

So:

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  • And those Macs purchased after July 1, 2011 when OS X Lion was released got an additional feature called Internet Recovery, which downloads the essential recovery software contents from internet to network boot your Mac.This becomes handy when your internal Mac’s hard drive is damaged or recovery partition is missing.
  • Mac OS X Lion (version 10.7) is the eighth major release of macOS, Apple's desktop and server operating system for Macintosh computers. A preview of Mac OS X 10.7 Lion was publicly shown at the 'Back to the Mac' Apple Special Event on October 20, 2010.

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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.

Boot Mac Os X Base System

Cloning courtesy of the fantastic bombastic CCC.

Boot Mac Os X Recovery Mode

Option 2

Boot Mac Os X From External Drive

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.