The best Mac alternative is IDA-STEP Viewer, which is free. If that doesn't suit you, our users have ranked more than 10 alternatives to STP Viewer and three of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to STP Viewer are Mayo (Free, Open Source) and CaniVIZ (Freemium).

• Glovius is a modern CAD viewer for Windows, iOS, Android, and Web Browsers. Glovius offers powerful tools for 3D and 2D CAD data consumption, analysis, workflow automation, and report generation. Glovius CAD viewer supports CATIA, NX, STEP, IGES, Pro/ENGINEER and Creo, SOLIDWORKS, Inventor, and Solid Edge files.
• Autodesk Viewer supports most 2D and 3D files, including DWG, STEP, DWF, RVT, and Solidworks, and works with over 80 file types on any device. Get the feedback you need with Autodesk Viewer’s annotation and drawing tools for easy online collaboration. View DWG files or convert them to work with older versions of AutoCAD software.
• This article describes how to view DWF, DWFx, STEP, and other file types on macOS without having AutoCAD for Mac installed. Solution: Use the free online Autodesk Viewer. It can be used to take measurements and create markups on many different file formats, including DWF and DWFx.
• Free Online STEP File Viewer View and optionally share your STEP files online for free. No download or signup required. Renders and verifies file integrity of STEP and STP files made with Solidworks, AutoCAD, Fusion 360, CATIA, Solid Edge, NX, Creo, FreeCAD, TurboCAD, Rhino, and more.

Files with step file extension are quite often found as 3D model / part files saved in STEP (Standard for the Exchange of Product Data) format.

Software that open step file

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STEP file extension- ISO-10303 STEP product data file

What is step file? How to open step files?

File type specification:

The step file extension is used for 3D files created in STEP (Standard for the Exchange of Product Data) format.

STEP is an ISO standard for the computer-interpretable representation and exchange of industrial product data. Typically STEP can be used to exchange data between CAD, Computer-aided manufacturing, Computer-aided engineering, Product Data Management/EDM and other CAx systems.

STEP is addressing product data from mechanical and electrical design, Geometric dimensioning and tolerancing, analysis and manufacturing, with additional information specific to various industries such as automotive, aerospace, building construction, ship, oil and gas, process plants and others.
MIME types:
application/step

Updated: April 9, 2021

The default software associated to open step file:

Company or developer:
SolidWorks Corporation

A popular is 2D and 3D CAD (computer-aided design) and CAE (computer-aided engineering) construction software for Microsoft Windows developed by SolidWorks Corporation.

SolidWorks is distributed in three distributions: Solidworks Premium, Solidworks Professional and SolidWorks Standard.

Company or developer:
Dassault Systèmes S.A.

PLM/CAD/CAM/CAE software suite used to create virtual 3D models, developed by Dassault Systèmes S.A. for Microsoft Windows. CATIA is written in the Fortran and C programming languages.

CATIA delivers the unique ability not only to model any product, but to do so in the context of its real-life behavior: design in the age of experience. Systems architects, engineers, designers and all contributors can define, imagine and shape the connected world.

Company or developer:
Autodesk, Inc.

Autodesk Inventor is 3D solid modeling and design tool used to design and simulation 3D digital prototypes.

Autodesk Inventor shares 2D data from the AutoCAD and 3D design data from other Autodesk's applications. Autodesk Inventor is available for Microsoft Windows.

Help how to open:

Most modern CAD programs support STEP format and are able to work with it.

How to convert:

Use any compatible tools to transform STEP data to other formats.

Find conversions from step file:

Find converter to step file type:

Related links:

List of software applications associated to the .step file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open step file, edit step file, convert step file, view step file, play step file etc. (if exist software for corresponding action in File-Extensions.org's database).

Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting step files.

Software that open step file - ISO-10303 STEP product data file

Programs supporting the exension step on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open step file action.

Microsoft Windows:

Main software associated with step file by default:
CATIA
Other suggested software:
ZEMAX
AutoCAD
TurboCAD
TopSolid
Creo Parametric

Apple macOS / Mac OS X:

Afanche 3D Viewer for Mac
AutoCAD for Mac
TurboCAD for Mac

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Step Viewer Mac Freeware

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Step File Viewer With Measurement

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