I would like to make a boot disk in case of main drive failure. 2009 iMac running El Capitan with a superdrive fitted.
Grateful for any help.
iMac, Mac OS X (10.6.8), Using trackpad
You must have a copy of the El Capitan Installer that you downloaded from the App Store. Download the freeware utility called, DiskMaker X. Use it to create a bootable installer on a USB flash drive of at least 16 GBs.
You should get OS X El Capitan from the App Store. Quit the installation process when it starts and follow this guide
alecfromhelensburgh wrote:
I would like to make a boot disk in case of main drive failure. 2009 iMac running El Capitan with a superdrive fitted.
Grateful for any help.
A boot disk like a bootable clone?
Use Carbon Copy Cloner or SuperDuper to clone to an external HD.
alecfromhelensburgh wrote:
I would like to make a boot disk in case of main drive failure. 2009 iMac running El Capitan with a superdrive fitted.
Grateful for any help.
If you get a 32GB Flash Drive, you can install OS X 10.11 on that flash drive. Might work with a 16GB drive also.
If that is what you are trying to do, i.e. create a bootable installer, 8GB flash is all you need.
Easy enough to do with the createinstallmedia terminal command:
sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app --nointeraction
reference:
How to make a boot up disk?
