I should get the con out of the way first before getting into the pros.
Usb stick mac os.
Next you re going to head on over to the mac app store on a mac laptop or computer.
By default mac os x doesn t use a case sensitive file system.
Creating the bootable os x el capitan installer will erase the usb flash drive you re using.
In the mac app store download the operating system installer.
If your current os installation is still functioning you should be able to get there.
You can now run the operating system as normal and can use this usb drive to boot up your mac if your boot drive fails.
Otherwise call a friend who also owns a mac and ask nicely to use theirs to make the bootable usb stick.
Os x extended case sensitive journaled.
Before you proceed make sure you have a backup of the flash drive s contents or that you don t care that the data will be erased.
Don t be surprised by the slowness it will take considerably longer to boot the operating system of a usb drive than the pcie ssd installed in modern macs.
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While making a macos installer is undoubtedly a great time saver if you have lots of macs to work on there is a downside.
After that right click the usb drive and select restore with disk image.
After that transmac will create bootable mac os usb within few minutes.
If you want to use your usb stick with an apple mac you will need to restart or power on the mac with the usb stick inserted while the option alt key is pressed.
Since operating systems are continually updated to stay on top of security issues whatever version of the operating system you end up putting on.
This option exists because it matches the traditional behavior of unix and some people might need it don t select this unless you know you need it for some reason.
On a case sensitive file system file is different from file.
How to create a bootable macos high sierra installer drive put the macos high sierra installer on an external usb thumb drive or hard drive and use it to install the operating system on a mac.
This will launch apple s startup manager which shows bootable devices connected to the machine.