Simple 3-Step to make an Installer USB for OS X El Capitan
I was lazy enough to have El Capitan downloaded and installed by double clickā¦which was certainly the most stupid thing I did recently. My iMac (late 2012) couldnāt carry it along anymore. Several hours later I had to reinstall by starting from scratch.
After carefully reading many forums online Iāv integrated necessary info into a 3-step summary fyi.Ā
1. Get ready a portable disk with more than 8GB storage (USB3.0 has been tested OK);
2. Open āDisk Utilityā and format the disk with āOS X Extended (Journaled)ā and āGUID Partition Mapā. Name the disk as āOSXā (for Godās sake);
3. Open āTerminalā window, copy & paste following command:
sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/OSX --applicationpath /Applications/Install OS X El Capitan.app --nointeraction
then wait and see below info running inside āTerminalā:
Erasing Disk: 0%... 10%... 20%... 30%...100%...
Copying installer files to disk...
Copy complete.
Making disk bootable...
Copying boot files...
Copy complete.
Done.
It could take some time depending on your Mac condition. Your installer disk will be ready only when you see the final āDoneā.
Now go ahead for a clean installation!