


Open your Activity Monitor to see which applications are hogging your RAM.Files that you’ve used recently remain on your Mac, along with optimized versions of your photos. Each file stays right where you last saved it, and downloads when you open it. When storage space is needed, files, photos, movies, email attachments, and other files that you seldom use are stored in iCloud automatically. Optimized Storage in macOS Sierra and later* can save space by storing your content in iCloud and making it available on demand.
