The Apple Developer Tools are a suite of software tools from Apple to aid in making software dynamic titles for the macOS and iOS platforms. The developer tools were formerly included on macOS install media, but are now exclusively distributed over the Internet. Xcode is available as a free download from the Mac App Store.

A graphical interface for JavaScript's Plug-in, which aids developers by demonstrating how Java applets perform on macOS. Provides tools to adjust the performance, behavior and user experience in applets in development.

A graphic presentation of audio units helping software developers to examine their results in decibels. AU Lab can be used to test audio units, conduct live mixing, and playback of audio content. Audio units are controlled visually with the audio unit's graphic interface and touch screen.^{[citation needed]}

A set of software tools, collectively Computer Hardware Understanding Development Tools (CHUD Tools) measure software performance on macOS, to aid in optimizing. Also provides hardware system benchmarks.

Used in testing Core Image units, which function similar to Adobe Photoshop filters. Each has a specific action, with parameters customize the action. Showcases Core Image, a technology introduced in Mac OS X 10.4, supported by newer graphic hardware.

A developer utility for setting report parameters for Apple's Crash Reporter application.

A staple of macOS's developer tools since the days of NeXTSTEP, FileMerge graphically compares two or more versions of a file. True to its name, FileMerge allows the user to easily merge the two or more versions into one file. The utility is often used to track changes to source code.

macOS's opendiff command provides the ability to launch FileMerge from the command line. The -ancestor parameter can be used for three-way merging.