#How to create mac os usb bootable drive mac os x#
#How to create mac os usb bootable drive install#
#How to create mac os usb bootable drive iso#
#How to create mac os usb bootable drive windows 7#

In most of the new mac computer, you can just press cmd+r while booting and the mac will automatically download everything you need to install the system, but the oldest does not have this tool.

#How to create mac os usb bootable drive mac os x#

The first thing you have to do is make sure what model you have (the year when your computer has been released) then check on the official apple website to see what is the latest macOS or Mac OS X version available for you computer. I had this problem with a friend computer, it was an old iMac and I'll tell you it is not going to be easy. So basically, the USB drive cannot have any high level formatting, the Windows system should detect the drive as 'not formatted' for this to work, which it will if prepped right with Diskpart. When I tried to inject the image, Transmac told me that the drive was 'write protected'. Note: I use 'Rufus' for all other USB writing and formatting for Windows systems, it's a great app, but I had previously tried to format the drive as GPT using that, as a Fat32 partition. DISKPART> convert gptĭiskPart successfully converted the selected disk to GPT format. DISKPART> cleanĭiskPart succeeded in cleaning the disk. (Find the disk number) DISKPART> select disk x (from result of List Disk)ĭisk x is now the selected disk. Here are the Diskpart commands used to prep the Flash Drive, just to have them here in case my Link does not work: diskpart I've been trying to post this to confirm that it works for some time, I just hope it helps someone else, because it is a very easy solution.

Someone had reported that the method for using DISKPART did not work, but I have done this twice and it works remarkably well, and it's the only method I could find to create a Mac-Bootable Flash.

#How to create mac os usb bootable drive windows 7#

I used TransMac on Windows 7 to restore the image file I had to the Flash Drive, it created a bootable Mac image on my flash drive. Dryden's Link, I was able to use the Diskpart command to clean and prep a GPT partition on a flash drive for an OSX Mavericks install image. I was never able to write a Mac installer image to my Flash Drive and have it bootable, unless I did it on a Mac. This is it, you have a bootable OS X usb drive.I know this question is old but it is still valid. From the first iso, obtained on step 3, copy BaseSystem.chunklist and BaseSystem.dmg on the thumb drive (actually, the latter might not be necessary - but it worked for me at this step and I stopped experimenting). Mount the thumb drive (you might need to apt-get install hfsprogs to mount an HFS filesystem). In my case (High Sierra 10.13.6), 4Gb stick was sufficient, even though createinstallmedia requires 8Gb.

#How to create mac os usb bootable drive iso#

iso as well ( dmg2iso -i BaseSystem.dmg -o BaseSystem.iso)Ĭopy it to a thumb drive: dd if=BaseSystem.iso of=/dev/sdX BS=1M. iso įind BaseSystem.dmg in the mounted image. You can do it from GUI (right click, 'Open with disk image mounter') or something like mount -o loop. So, you'll need to find an alternative source.Ĭonvert. This question on apple support has all the links, but they are only accessible from OS X (if you had access to a live OS X at this point - you probably would've just used createinstallmedia already, right?). Unlike El Capitan, High Sierra only needs BaseSystem.dmg, which also has enough free space to boot - so, the process overall can be simplified a bit.

So, leaving it here in case somebody else will need to. I recently had to make a High Sierra 10.13.6 bootable USB drive, and the process turned out a bit more involved that just dd-ing the dmg2img-generated ISO to a thumb drive.