How to backup Install OS X el Capitan downloaded from Appstore from DMG file?

[BryanCooper10]

Can I backup Install OS X El Capitan downloaded from Appstore to a dmg file?

For avoid re-download it after update.

 

[ammulder]

You can right-click on it and choose "Compress" to make a .zip file of it, and do whatever you like with that. I'm sure a DMG would work too.

 

[BryanCooper10]

Thanks, I'm going to try it.

 

[BryanCooper10]

Thanks works very well.