The conventional way to update Retro Pie and install new features is through the setup script.
The setup script can be accessed from the Retro Pie menu in emulationstation.
Assuming the default settings, updates for important system files and security software are always automatically downloaded and installed.
On the other hand, by default, most OS X system and Mac App Store updates are automatically downloaded in the background but not installed.
This option is not turned on by default on new OS X systems.
Again, by default on OS X, Mac App Store updates will not automatically install.
You may, however, receive an additional notification that asks “Turn on Auto Updates?
” Clicking the Turn On button from this notification turns on automatic installation for Mac App Store items.
It can also be accessed from the terminal with Core Packages Each section of the manage packages portion of the setup script have the option to install/update all packages and remove all installed packages.
You can also update/install and remove packages individually.
You can create an sd image of your current sd card with win32diskimager (if you're on windows) Note: images created this way can only be written to a micro SD card of the EXACT same size or bigger.
As an example you may not be able to write an image of a 64GB micro SD onto another 64GB card.
Adding new capabilities is the very reason “software” exists.