OS X Mavericks 10.9, released in October 2013, was a landmark moment for Apple as it marked the first time a major Mac operating system was offered as a free upgrade
to create the media. Run this command: sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Mavericks.app (Replace "Untitled" with your USB drive's name) . System Requirements Mavericks is generally compatible with the following Macs: iMac : Mid 2007 or newer MacBook : Late 2008 (Aluminum) or Early 2009 or newer MacBook Pro : Mid/Late 2007 or newer MacBook Air : Late 2008 or newer Mac mini : Early 2009 or newer Mac Pro : Early 2008 or newer Memory : Minimum 2 GB RAM (4 GB recommended). mac os x mavericks 10.9 iso and dmg image download
If possible, verify the integrity of the downloaded file using checksums. OS X Mavericks 10