Apple's new MacOS Sierra software introduces two ways to help you offload files from your Mac to iCloud. It lets you reclaim storage space on your local drive, while also making those files accessible from your other devices.
The first way lets you sync your Desktop and Documents folders to iCloud Drive, so that files in either location are more easily accessible, as long as you have an internet connection. The second way lets you move to iCloud Drive or simply delete older files to reclaim some space on your Mac's cluttered drive or, as Apple calls it, optimize Mac storage.
Before we jump in, you should know that some of the options below require you to set up an iCloud Drive account, namely uploading your Desktop and Documents folders and your Photos library to iCloud. Apple provides a meager 5GB of space for free, a limit you must share with any of your iPhones or iPads that use iCloud and will most certainly exceed in short order, even if you don't opt to upload your photos. If 5GB of space won't cut it, you will need to upgrade to an iCloud Drive paid plan.
Let's take a look at how you might optimize your Mac's storage with Mac OS Sierra.