#MAC OS X DMG TO BOOTABLE USB HOW TO#
#MAC OS X DMG TO BOOTABLE USB MAC OS#
#MAC OS X DMG TO BOOTABLE USB INSTALL#
#MAC OS X DMG TO BOOTABLE USB UPDATE#
#MAC OS X DMG TO BOOTABLE USB PRO#

Method #1: Convert the DMG File into ISO Image File.

When youвЂ™re done, you may need to use Parted or a similar utility to re-format your USB as a normal drive again.

#MAC OS X DMG TO BOOTABLE USB INSTALL#

Click on the EFI, and then follow the prompts to install OS X from the USB drive! This gave me the choice of booting from EFI, or choosing a WiFi network. I plugged the USB into the MacBook, and opened the startup menu by holding down Option whilst pushing the power button. Once I had done this, I ran the script with my USB connected (/dev/sdb for me, but CHECK YOURSELF with fdisk or similar) and after quite a while it finished copying. If $(echo $high_sierra_checksums | grep -q '$checksum')Д®cho ' WARNING: checksum $checksum belongs to High Sierra installer which is not supported yet'Д®cho ' WARNING: checksum $checksum does not match any of known OSX images'

If $(echo $supported_checksums | grep -q '$checksum')Д®cho ' $checksum is a known checksum of OS X installer disk image' Essentially, just open the script and delete this section echo ' # verifying installer image checksum' All I did was delete the checksum check from the script above.

#MAC OS X DMG TO BOOTABLE USB UPDATE#

I think this is because Apple updates the dmgвЂ™s anytime there is a security update for El Capitan so the checksum list isnвЂ™t updated. ONE CAVEAT: When I ran this script on my InstallESD.dmg, it crashed because it didnвЂ™t recognise the checksum. It takes the DMG and writes everything directly to the USB in the right place. Thankfully, a script exists to convert this DMG to a bootable usb, and itвЂ™s available here. This actually contains all the interesting boot files, but it isnвЂ™t a pristine image, so we canвЂ™t just burn it to a USB. Now, within the extracted files you will find something called InstallESD.dmg. It will extract to the current working directory xar -xvf InstallMacOSX.pkg This requires a utility called вЂњxarвЂќ 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 вЂdmg2imgвЂ™ sudo apt-get install dmg2img (In total you will need to use about 15-18GB of disk space by the time youвЂ™ve done all the extracting necessary, which shouldnвЂ™t be a problem for most computers but it was a challenge for my laptop with itвЂ™s 128GB SSD and dual boot Windows/Linux!) The format doesnвЂ™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 itвЂ™s blank. ItвЂ™s a 6GB file so it might take a вЂlil while.

I also couldnвЂ™t find a single guide online that worked from start to finish, so here I summarise what needs to be done.ДЄs usual, this is all at your own risk рџ™‚ДЇirst you need to go to AppleвЂ™s OS Download Page and (step 4) get ahold of вЂњInstallMacOSX.dmgвЂќ 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 вЂњChunk validation failed, retryingвЂќ about 1000 times and eventually gives up altogether.ДЇurther 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 AppleвЂ™s servers, but it seems the error can appear for all sorts of reasons.

#MAC OS X DMG TO BOOTABLE USB MAC OS#

After about 30 seconds, a window pops up saying вЂњ CanвЂ™t download the additional components needed to install Mac OS XвЂќ and the installation gives up. I tried that with this machine, and upon hitting вЂњReinstall MacOS XвЂќ 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 wasnвЂ™t much worth saving I wiped it and initiated recovery mode in order to re-install OS X (El Capitan).

#MAC OS X DMG TO BOOTABLE USB PRO#

I was recently given a 2011 MacBook Pro that had been вЂњwell-lovedвЂќ and was therefore a mess of missing applications, ghost files and generally slow-as-hell.

#MAC OS X DMG TO BOOTABLE USB HOW TO#

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.

Mac os x dmg to bootable usb