Aperture is a discontinued professional image organizer and editor developed by Apple between 2005 and 2015 for the Mac, as a professional alternative to iPhoto.

Aperture is a non-destructive editor that can handle a number of tasks common in post-production work, such as importing and organizing image files, applying adjustments, and printing or exporting photographs. It can organize photos by keywords, facial recognition, and location data embedded in image files, it offers brushes for applying effects such as dodge and burn, skin smoothing, and polarization, and it can export to Flickr, Facebook, SmugMug, and iCloud.

At WWDC 2014, Apple announced that its Photos app would replace Aperture and iPhoto. The final release of Aperture, version 3.6, was released in October 2014, and subsequently discontinued and removed from sale on April 8, 2015. Although support for 32-bit apps, including Aperture, was removed in macOS Catalina, a patch created by an external party allows Aperture 3.6 to function on newer versions of macOS.

Apple Aperture is a professional photo editing and management application that offers a variety of features for professional photographers. One of its key features is complete support for importing and exporting raw image formats, for supported cameras. It also offers tethered shooting support for DSLRs made by Nikon and Canon; when photographers connect these cameras to their computers, they can be instantly imported without user action, for a more efficient workflow. The app's Raw Fine Tuning feature allows users to manage and adjust the conversion parameters of different versions of RAW decode. In addition, Aperture allows users to choose whether to keep their master image files in place on their filesystem, or migrate them into the Aperture library upon import.

Aperture also offers a range of image adjustment tools, including specific color retouching, a luminance-based edge sharpener, and spot repair. It also has lens correction tools, such as chromatic aberration correction, to help improve the overall quality of an image. In terms of project management, Aperture offers extensive metadata and searching support, as well as the ability to group photos using autostacking based on the time between shutter clicks.

Aperture offers a number of features for organizing and managing photos. Autostacking groups photos based on the time between shutter clicks; users can also manually group photos into Stacks, and create multiple working copies of the same image using the Versions feature. The loupe tool allows users to view images at zoom levels from 50% to 1600%, while the Light Table feature serves as a freeform workspace for sorting and selecting images. Aperture also offers the ability to simultaneously zoom and pan multiple images to compare them. It supports a full-screen mode for editing and sorting images, and can span multiple computer displays.

In addition to its native support for the Adobe Photoshop PSD, PNG, JPEG, and TIFF formats, Aperture offers nondestructive image editing, customizable printing and publishing options, and the ability to import photos from USB and FireWire memory card readers or directly from a camera connected via USB. It also has read and write support for IPTC image metadata and customizable book creation tools. Finally, Aperture has a heavily customizable book creation feature, as well as the ability to create web galleries and blogs that can be uploaded via FTP or WebDAV.

Unlike Adobe Lightroom, Aperture stores photos by default inside a package, rather than inside normal folders, however it can also manage photos stored in regular folders (referenced files)