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Restored my MacBook via USB boot. Fast path is this using 2 USB sticks: download Mac OS dmg file (google it) on another PC to one USB stick. insert USB stick with dmg to your Mac and burn this dmg to another USB stick using Disk Utility. restart your Mac and hold option key. proceed with installation. (3) k9-unit.
A downloaded installer for Mac OS X Lion; Download Mac OS X Lion. Download: Mac OS X Lion. This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with Lion, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install Mac OS X Lion into your Applications folder. You ...
Here’s how I solved this problem: [Not sure if needed] Booted on the recovery volume, to disable System Integrity Protection (SIP). Downloaded El Capitan’s installer from the App Store, on another Intel-based Mac. Created a USB boot disk from the installer, using the command line utility included with it.
Download Mac OS X 10.6 10a432 DVD image (direct link from Apple) Download Mac OS X 10.5 9a581 DVD image (direct link from Apple) [Have not checked these for validity; or yet to see if they're really OK]
Try Command-Option R to invoke it. No added software of any kind required -- it can even get there if the boot drive has been removed. Internet Recovery leaves your drive completely free to be completely ERASED. You can tell that is where you are going when it asks to select a Network, and you see the spinning globe.
Go to Section 4 and click on Download OS X Yosemite. This downloads InstallMacOSX.dmg to your Downloads folder. The next section can only be done on a mac that is capable of running Yosemite, a mac that came preinstalled with an OS later than Yosemite will refuse to do the next bit.
So, from the OS X Utilities screen, I follow the steps on Apple support website to “use disk utility to erase my Mac”. Once that is complete, I am. returned to OS X Utilities screen and attempt reinstalling OS X El Capitan. Once again, no luck. …can’t download the additional components needed to install OS X… I’m at a loss. Please help.
Safari downloads the following installer as a disk image named InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install OS X Mountain Lion. Open that app from your Applications folder to begin installing the operating system.
This may be the problem you are experiencing. Try this workaround, we are going to set the time and date on your mac to a date previous to the expiry date of the certificates. Boot to your Recovery HD, click on Utilities in the menubar select Terminal. Enter a new date, for example or just copy and paste.
.smi files Disk utility won't open in Mac OS X 10.9, but it will convert to .dmg files. If you copy the contents to a USB Flash drive of the same name as the dmg file (without the suffix), it can hold the installer in question and connect older Mac OS 9 machines to run the installer from.