Make El Capitan Bootable Usb

Apple Support Make El Capitan Bootable Usb
Make A Bootable El Capitan Usb
Create Windows 10 Bootable Usb

How To Create Bootable Usb For Os X El Capitan Download A new pop up box will appear, click on the three-dots, and then select the macOS X El Capitan.DMG file from Windows. Then click on OK. Since the file is huge so it will take quite time to complete. Create Bootable USB for Mac OS X El Capitan with TransMac. A new pop up box will appear, click on the three-dots, and then select the macOS X El Capitan.DMG file from Windows. Then click on OK. Choose Mac OSX El Capitan DMG file. Since the file is huge so it will take quite time to complete. It may take about 20 to 30 mins or more.

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.

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.

Apple Support Make El Capitan Bootable Usb

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.

In this article, I will show you How to create Bootable USB for Mac OS El Capitan on Windows using Transmac. 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. Therefore, it has outstanding features that the previous version of Mac doesn’t have that. It is better now that we should create a bootable USB installer drive to install Mac OS.

You all have the information about “Transmac” software about its function that how it works, or how to download “TransMac” and how to install that on your Windows PC? However, you need the following requirements to create a great bootable USB installer for Mac OS El Capitan.

Why we use TransMac to Create bootable USB for mac os el Capitan?

TransMac is a simple application to open hard drives disk, Flash drives, CD/DVD high-density floppy disk on Windows 10/7/8/8.1 or lower version of other Windows. to use this application you just need to insert the drive you need, and one of the great function is this that it will automatically read the drives, TransMac is a great tool that you can access the Mac file on Windows operating system using TransMac.

TransMac Features

You are allowed to use the TransMac for 15 days trial, and after that, if you want to use that more then 15 days then you need to purchase that. All the features are the same for Mac.
The system requirements are you need Windows 10/7/8/8.1 or Windows Vista and XP.
The users can buy TransMac for $59.00 with the license.
Apple files system (APFS) are only supported.
Open Mac APFS/HFS/HFS+ format disk drives, flash drives, CD/DVD/Blu-ray media, HD floppies, dmg, dmg part, sparse bundle, and sparseimage files.
Copy files to Mac and image file
Format HFS to Mac
Save and restore image files to disk and USB flash.
Create, compress image files for Mac
Burn your ISO file and dmg file directly to CD/DVD Blu-ray.
View the partition layout

Now Create bootable USB for Mac OS El Capitan on Windows

Now it is the time to create a bootable USB installer using TransMac, To install Mac OS El Capitan on VirtualBox on Windows 10 you need a Bootable USB here you will learn the steps of creating a bootable USB installer for Mac OS El Capitan on Windows.

Step #1. Before going to create a bootable USB for Mac OS El Capitan you need to download TransMac. Therefore, you can download TransMac from the given link. After that, you are download TransMac now install that on your computer, the installation process is too much easy everyone can install that on their PC/Computer with a simple procedure. Just click on the setup file and with some click, the installation will finish. After that, Launch TransMac when TransMac is launched you will see the list of Flash drives or local disk. Then Right-click on that flash you want to create bootable USB for Mac OS El Capitan then select Restore with Disk Image.

Restore with the Disk image

Make A Bootable El Capitan Usb

Step #2. Now a warning message will pop-up after you select Restore with Disk Image, and in this step, select Yes.

Create Windows 10 Bootable Usb

Step #3. After that, you clicked on yes now a dialogue box will come just click on that and browse for VMDK file and select the file and click Open.

select Mac OS EL Capitan VMDK file

Step #4. After that, you clicked on Open in here your file will be ready to copy on USB drive click on “OK”.

Copying your File VMDK file to USB

Step #5. After that, you clicked OK now in this step, your Mac OS EL Capitan VMDK file will copy to your USB drive. Have patience and wait for some minutes that should copy your file.

Copying Mac OS EL Capitan File to USB

Conclusion

That’s all about it,Now you are totally done with creating the USB drive. Therefore, if you faced any problem regarding this you can comment on below comment box and share your ideas. Furthermore, we will discuss that and don’t forget to subscribe our website with your email address and have a notification about our latest post.