The new Sync Settings feature in Photoshop CC uses your Adobe ID to synchronize your settings between the two software installs allowed in the license agreement (your home and work computer for example).
To sync settings between your computers, (at work and at home for example), select Photoshop > (UserID) > Sync Settings and choose which settings you want to sync. Available settings include: Preferences, Actions, Brushes, Swatches, Styles, Gradients, Custom Shapes, Patterns, Contours and Tool Presets. This will sync (upload) the settings from this computer to your Creative Cloud account.
Note: You must have internet access and be signed in to your Adobe account to sync settings. To sign in, choose Help > Sign In.
Then, on your second computer, (using your second install of Photoshop), select Photoshop > (UserID) > Sync Settings. This will sync (copy) the settings from the cloud to this computer.
In order to manage what settings to sync as well as what should happen if conflicts arise , select Photoshop > (UserID) > Manage Settings (or, select Preferences > Sync Settings). If you don’t want certain settings to sync, simply uncheck them. When conflicts occur, (meaning that you have settings that are different on the local computer and the cloud), choose to either keep the remote or local settings (local is referring to the local computer and remote is referring to the settings in the cloud).
Note: you are always in control of when you sync your settings (i.e. there is not an option to “auto sync settings” – they will only sync when you select “Sync Settings Now”).
And don’t forget, you can always sync your settings on a single machine/single install which can really save time when upgrading your machine or when bad things happen (like a drive goes down that has your settings/applications on it).