Bootable 8Gb USB Flash Drive with OS X Yosemite 10.10.5 

Condition: Brand New with 6 months Limited Warranty

For Recovery , Clean installation or System Upgrade 

• OS X 10.6.8 or later
• 2GB of memory
• 8GB of available storage
• Some features require an Apple ID; terms apply.
• Some features require a compatible Internet service provider; fees may apply.

Feature Requirements

Handoff and Instant Hotspot Supported by the following Mac models:

• MacBook Air (2012 or newer)

• MacBook Pro (2012 or newer)

• iMac (2012 or newer)

• Mac mini (2012 or newer)

• Mac Pro (Late 2013)

Handoff requires an iPhone, iPad, or iPod touch with a Lightning connector and iOS 8.
Instant Hotspot requires an iPhone or iPad with cellular connectivity with a Lightning connector and iOS 8.1. Requires Personal Hotspot service through your carrier.

more details of OS X Yosemite please check : https://support.apple.com/kb/SP728?viewlocale=en_US&locale=en_US