- #El capitan dmg to usb how to
- #El capitan dmg to usb mac os x
- #El capitan dmg to usb mac os
- #El capitan dmg to usb install
- #El capitan dmg to usb pro
It will extract to the current working directory xar -xvf InstallMacOSX.pkg
#El capitan dmg to usb install
This requires a utility called “xar” to extract, which can be installed with these instructions (from ) sudo apt-get install build-essential libxml2-dev libssl1.0-dev zlib1g-dev You can then extract the DMG sudo dmg2img InstallMacOSX.dmg InstallMacOSX.img Then you need to get a program called ‘dmg2img’ sudo apt-get install dmg2img (In total you will need to use about 15-18GB of disk space by the time you’ve done all the extracting necessary, which shouldn’t be a problem for most computers but it was a challenge for my laptop with it’s 128GB SSD and dual boot Windows/Linux!) The format doesn’t matter, because this procedure will format it correctly. You will also need to find a USB drive with at least 8GB capacity, and make sure it’s blank. It’s a 6GB file so it might take a ‘lil while. I also couldn’t find a single guide online that worked from start to finish, so here I summarise what needs to be done.Īs usual, this is all at your own risk 🙂įirst you need to go to Apple’s OS Download Page and (step 4) get ahold of “InstallMacOSX.dmg” for El-Capitan. Apple seem to assume everybody has a spare MacBook from which to create a bootable USB so they provide absolutely no documentation to help with this. I use Linux Mint on my main laptop and that was all I had available. I then turned to attempting to make a bootable USB stick of OS X El Capitan from an image downloaded from Apple. I also tried Internet Recovery (Command+Option+R) but that gave exactly the same error (and would also only have installed OS X Mountain Lion). The detailed error log says “Chunk validation failed, retrying” about 1000 times and eventually gives up altogether.įurther investigation suggests this may be something to do with security certificates having expired and hence the machine not being able to download the necessary files from Apple’s servers, but it seems the error can appear for all sorts of reasons.
#El capitan dmg to usb mac os
After about 30 seconds, a window pops up saying “ Can’t download the additional components needed to install Mac OS X” and the installation gives up. I tried that with this machine, and upon hitting “Reinstall MacOS X” was greeted with a prompt telling me it would take -2,148,456,222 days and 8 hours (an uncaught buffer overflow, me thinks). Having recently fixed a busted MacBook Air I had learned a bit about Recovery Mode (hold Command+R whilst pushing the Power button and release a few seconds after the machine wakes up). Since there wasn’t much worth saving I wiped it and initiated recovery mode in order to re-install OS X (El Capitan).
#El capitan dmg to usb pro
I was recently given a 2011 MacBook Pro that had been “well-loved” and was therefore a mess of missing applications, ghost files and generally slow-as-hell.
#El capitan dmg to usb mac os x
OSX 10.10 Yosemite sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ Yosemite.How to make a bootable USB drive on Linux Mint (19.3) to allow you to install Mac OS X El Capitan on a MacBook with broken or corrupted recovery mode. OSX 10.11 El Capitan sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Launch the Terminal from /Applications/Utilities and enter the command below and then your password when prompted, be sure to change the ‘ MyVolume‘ name in the below command to your external disk name.
If in the instance it already says ‘Downloaded’ and it’s not in your /Applications folder, first of all try a search on your machine for it, if still no go, launch LaunchPad in Applications and find the installer, in this instance ‘Install OS X Mavericks’ and move to the Trash – now you should be able to download from the App Store app. If it’s not there check in your purchased tab of the App Store app and you can click Download. If you have previously downloaded either OSX 10.11 El Capitan, 10.10 Yosemite 10.9 Mavericks it should be in your top level Applications folder. This can be useful for downgrading an OS to an earlier version, some older machines don’t run El Capitan that well which users discover after they have upgraded. It is done via the Terminal from a command Apple introduced since OSX Lion called createinstallmedia , all you need is the original OSX app installer and a spare external drive to make a copy of the new OS installer on which you will be able to boot from.
#El capitan dmg to usb how to
This guide deals with how to make a bootable disk of either OSX 10.11 El Capitan, 10.10 Yosemite or 10.9 Mavericks.
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