Mac App Index is a website that catalogs applications for macOS. The service presents a curated collection of Mac apps and ranks them based on upvotes submitted by users of the site. The main page includes sections for currently popular applications under the heading "Hot right now" and for newly added software under "Fresh apps, newest first." Each app entry includes a short description of its function. The site organizes its content into categories such as "Featured" and "Collections." Featured apps include Magnet, which snaps windows into tidy layouts; CleanMyMac, which cleans up and speeds up a Mac; Things 3, a task management application; and Craft, a document creation tool. Other apps listed on the site include Klack, which produces keyboard sounds as the user types; Unclutter, which provides a pull-down drawer for notes, files, and clips; Dato, which shows calendar and time zones in the menu bar; and a native FTP, SFTP, and SSH client for macOS. Typical use cases for Mac App Index include discovering new software, tracking trending applications, and finding a tool for a specific job such as window management, disk cleanup, file transfer, or music production control. The site functions as a community-driven index, with rankings determined by user votes rather than editorial selection alone.