There are plenty of articles outlining how you can create a bootable OS X Recovery Disk, including ours. It would be great if you could invest in a high-capacity USB 3.0 flash drive to store the required tools. You can create a bootable drive to store an OS X Recovery Disk so that you can access recovery tools anytime, anywhere. Part 2: How to Create a bootable drive into Recovery Mode
It is noted that you are unable to boot Mac into Recovery Mode if you are using devices older than the ones below: Wait until the system finished downloading the recovery tools from Apple's website.Hold the 'Options', 'Command', and 'R' buttons until the boot chimes are triggered.To launch Internet Recovery, make sure your Mac is connected to a WiFi network and follow the steps below:
