System Preferences are the control centre for everything. Vital to know and use it. Usually a gear icon or similar near the left side of the Dock. The dock is the strip along the bottom of the screen.
On Mac OSX Adobe will automatically start because that's just Adobe being invasive. It's very annoying for those of us that work with Adobe products sporadically. Adobe has about five or six processes, two of which tend to take over CPU processing. Even if there's NO Adobe application running, Adobe insists that it's five or six process remain running at all times. Mainly, most of their applications are so memory intensive that they have to have the others loaded or each program will take a very long time to load. They obviously don't want to make it easy for you to shut down either.
Adobe does not register it's start up in OSX's System Preferences/Login Items under Users and Groups. It is an vendor-only setting. You'll need to turn it off yourself:
- Click on the menu bar icon for Adobe Creative Cloud.
- Click the ellipsis icon at the top-right.
- Select “Preferences”
- Uncheck “Launch at login”.
- Note: The “Preferences” option does not appear until you log in to Creative Cloud.