Mac Air version 2010 installs the Mac OS X 10.9 (13a603) system

Reference: http://www.macworld.com/article/2981585/operating-systems/ How-to-make-a-bootable-os-x-10-11-el-capitan-installer-drive.html

sudo ~/desktop/createinstallmedia--volume/volumes/mavericks--applicationpath/users/dj0708/documents/ Mavericks.app--nointeraction
Make u disk Startup disk stay in copying installer files to disk ...
Wait about 30 minutes.
Copy complete appears when you are finished.

Reference: http://www.applex.net/threads/57768/
The application replica cannot be validated. It may have been corrupted or tampered with during the download process.

An issue that has been caused by Apple's update of the developer certificate.
Modify the time in the terminal
Please completely copy the following code, press ENTER to confirm:
Date 122014102015.30

Reference: http://bbs.feng.com/read-htm-tid-7171299.html
The remaining time is approximately 1 seconds to wait for a longer time

Mac Air version 2010 installs the Mac OS X 10.9 (13a603) system