dmg

Hello, I have a clean High Sierra install (nvidia web drivers, audio, ethernet working) and now I'd like to start using it. I installed spotify, vs code, chrome and now I'm trying to install MySQL and SequelPro but they won't mount. They mount into a "GoogleSoftwareUpdate-1.2.8.82" volume. In...

Can I backup Install OS X El Capitan downloaded from Appstore to a dmg file? For avoid re-download it after update.