Summary
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.
- Having a bootable hard drive or USB flash drive is a handy troubleshooting tool. Make sure the El Capitan installer (or at least a copy of it), called Install OS X El Capitan.app.
- Download El Capitan.DMG from here. Download DiskMaker X. To do in Windows, we already shared a very specific instruction from here: Make Bootable Installation USB from Mac OS X.DMG on Windows PC. At for Mac users, there will be 2 doable methods. METHOD 1: Using DiskMaker X. Run, DiskMaker X, then.choose El Capitan (10.11).
How To Create A Bootable USB Drive For Mac OS X 10.11 El Capitan - PC - It’s logical to expect that most people of Mac proprietors with a compatible. In case you’re a normal person of one in all Apple’s Mac computer systems then the chances are that you’ll maintain abreast of news and announcements referring to the hardware and its. Apr 26, 2021 The El Capitan installer is downloaded to the /Applications folder, with the file name 'Install OS X El Capitan.' If you've installed El Capitan and want to create a bootable installer, re-download the installer from Apple.
Background
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. Since there wasn’t much worth saving I wiped it and initiated recovery mode in order to re-install OS X (El Capitan).
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). 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). 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. The detailed error log says “Chunk validation failed, retrying” about 1000 times and eventually gives up altogether.
Further 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. 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).
I then turned to attempting to make a bootable USB stick of OS X El Capitan from an image downloaded from Apple. I use Linux Mint on my main laptop and that was all I had available. 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 also couldn’t find a single guide online that worked from start to finish, so here I summarise what needs to be done.
Steps
As usual, this is all at your own risk 🙂
First you need to go to Apple’s OS Download Page and (step 4) get ahold of “InstallMacOSX.dmg” for El-Capitan. It’s a 6GB file so it might take a ‘lil while. You will also need to find a USB drive with at least 8GB capacity, and make sure it’s blank. The format doesn’t matter, because this procedure will format it correctly.
(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!)
Then you need to get a program called ‘dmg2img’
You can then extract the DMG
Now double click the .img file to mount it. In there is a InstallMaxOSX.pkg file. This requires a utility called “xar” to extract, which can be installed with these instructions (from https://www.oueta.com/linux/extract-pkg-and-mpkg-files-with-xar-on-linux/)
Then build and install with
Now you can extract the .pkg file. It will extract to the current working directory
Now, within the extracted files you will find something called InstallESD.dmg. This actually contains all the interesting boot files, but it isn’t a pristine image, so we can’t just burn it to a USB. Thankfully, a script exists to convert this DMG to a bootable usb, and it’s available here. It takes the DMG and writes everything directly to the USB in the right place.
ONE CAVEAT: When I ran this script on my InstallESD.dmg, it crashed because it didn’t recognise the checksum. I think this is because Apple updates the dmg’s anytime there is a security update for El Capitan so the checksum list isn’t updated. All I did was delete the checksum check from the script above. Essentially, just open the script and delete this section
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.
I plugged the USB into the MacBook, and opened the startup menu by holding down Option whilst pushing the power button. This gave me the choice of booting from EFI, or choosing a WiFi network. Click on the EFI, and then follow the prompts to install OS X from the USB drive!
When you’re done, you may need to use Parted or a similar utility to re-format your USB as a normal drive again.
How To Create Os X El Capitan Bootable Usb Flash Drive Tutorial
Therefore, you can create bootable usb for your mac using transmac on windows 10 7 8 8.1 here you will learn the easiest method of creating bootable usb. as you know that mac os el capitan is the newest version among mac. in here just follow my steps to create a bootable usb installer for your mac. is the twelfth major of the mac operating system. Creating bootable usb installer can be done in different ways specifically create bootable usb installer for macos x el capitan on windows and other macos versions. the first way to do manually and the second way is to do a software that is pre build to do all those with a click or two. Move 2: burn windows 10 to usb drive. to create bootable usb from iso, some of you may choose to use usb bootable software like rufus. it is thought as one of best, free, open source and easy to use windows 10 usb tool since it can create bootable usb for different kinds of operating systems. To create bootable usb installer for mac to install mac os x el capitan on windows, on mac or virtualbox, you have to create bootable usb flash drive. let’s get started on how to do it. step #1 . Follow these steps to create a bootable usb installer of el capitan in terminal. connect the usb flash drive to your mac. give the flash drive an appropriate name.
How To Create Os X El Capitan Bootable Usb Flash Drive Tutorial
I haven't yet found any tutorial on how to create a bootable usb drive on windows in order to reinstall os x on my beloved macbook air. any help would be greatly appreciated! macos windows usb boot install. share. improve this question. create el capitan's bootable usb drive using windows. 56. If you have problems creating the bootable media, you can get a usb flash drive with macos sierra, el capitan, catalina, big sur, etc., on it with the link mentioned below. (i haven’t tried it personally, but it’s worth the try if nothing works.). Fortunately, there's a great tool that you can use for free to create bootable macos media on a usb drive in a windows 10 environment. this article shows you how to download a macos dmg file, format a usb drive using a guid partition table, burn the dmg to the drive and boot your mac from the usb. How to create macos catalina bootable usb on windows: step by step this is a 4 step process, so please make sure you do not skip any part of it and eventually get frustrated with the failure. i have also shared a complete video tutorial on how to create macos catalina bootable usb on windows: step by step, you can find the video at the end of. #1. create bootable usb for macos sierra using the following methods. a. create bootable usb installer for macos sierra using unibeast b. create bootable usb installer for macos sierra via transmac c. create bootable usb installer for macos sierra diskmakerx. if any of this methods did not work for you let us know. good luck 😀.
Create Bootable Usb Mac Os X El Capitan With Dmg Yellowwed
How To Create Os X El Capitan Bootable Usb With Windows (without Mac)
Bootable Usb Creator
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