There are many alternatives to Fritzing for Mac if you are looking to replace it. The most popular Mac alternative is 
KiCad, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Fritzing and eight of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Fritzing are 
Autodesk EAGLE (Free Personal), 
LibrePCB (Free, Open Source), 
iCircuit (Paid) and 
DipTrace (Paid).
to design circuits, as well as so called "layouts", be it PCB or stripboard or breadboard... very-very handy a tool, very complex but very simple to use... If you're looking for more info about Fritzing like screenshots, reviews and comments you should visit our info page about it. Below you find the best alternatives.
KiCad is an open source software suite for electronic design automation (EDA) - designing schematics of electronic circuits and printed circuit boards (PCB). KiCad is developed by Jean-Pierre Charras. And features an integrated environment between schematic capture, bill of materials list, and PCB layout. Description-Source: Wikipedia
* Quickly test your ideas and validate circuit performance with a complete suite of SPICE simulation methods. * Drag-and-drop reusable design blocks between your projects, complete with synchronized schematic and PCB circuitry. * Precisely arrange and order PCB design objects with a complete set of alignment tools. * Route complex PCB layouts and maneuver around your design to easily get your trace to its destination. * Don’t rely on luck to fit your board in its enclosure.
Cross-platform (Unix/Linux, Mac OS X, Windows) All-in-one (project management, library/schematic/board editors) Intuitive, modern and easy-to-use graphical user interface Very powerful library design with some innovative concepts Human-readable file formats Open Source (GNU GPLv3)
Its advanced simulation engine can handle both analog and digital circuits and features realtime always-on analysis. It is the perfect companion to students, hobbyists, and engineers. You use it as you would any CAD program: you add elements, connect them together, and set their properties. But iCircuit is unlike other CAD programs because it is always simulating. It's just like working with the real circuit. You do not stop to take a measurement or spend a lot of time configuring reports.
DipTrace - Professional Schematic Capture and PCB Design Software Are you looking for a professional and easy-to-use PCB Design software with powerful autorouter and reasonable price? Try DipTrace and you will be surprised! DipTrace is a complete state-of-the-art PCB Design System. PCB design with an easy-to-use manual routing tools, shape-based autorouter and auto-placer. Schematic Capture with multi-level hierarchy and export to PCB Layout, Spice or Netlist.
Cross-platform PCB design tool that allows you to quickly design and fabricate boards.
Free for small designs Any size, any shape Multiple Layers Thru-hole and Surface Mount Parts Design rule checks Metric and Imperial units Ground planes and copper flood Use any PDF file as background Gerber and Drill file output PostScript and DXF file outputs Lua Scripting support
Software which creates PCB, and allows to create your electronic cards from elementary tools and customable objects library.
