macOS Utility App Development

I need a desktop application built exclusively for macOS that functions as a lightweight utility rather than a productivity suite or entertainment package. The core idea is to create a small, focused tool that runs natively, respects Apple’s design guidelines, installs cleanly, and feels at home on recent macOS versions.

I will share the exact feature set once we begin, but in broad strokes the app should launch quickly, sit unobtrusively in the menu bar or dock (whichever proves more sensible after we discuss UX), and carry out a single, well-defined task reliably every time it is invoked. Stability and an intuitive interface outweigh flashy visuals.

While I am open to your preferred stack, a solution written in Swift or Objective-C with Xcode is preferable so future maintenance and notarization are straightforward. Code must be clean, well-commented, and handed over with clear build instructions.

Deliverables:
• Signed, notarized .app (or .dmg) ready for distribution
• Complete Xcode project with source code and dependencies
• Brief README covering build steps, entitlement settings, and any third-party libraries used

If you have shipped macOS utilities before, please mention one or two examples so I can gauge fit.