System Requirements

Software and Hardware requirements for using Open CASCADE Technology 7.5.0.


Open CASCADE Technology System Requirements
Operating System
  • Arch Linux
  • CentOS
  • Fedora
  • Ubuntu
  • Debian
  • MS Windows
  • OS X/mac OS
  • Android
  • iOS
Minimum memory 512 Mb, 1 Gb recommended
Free disk space
(complete installation)
650 Mb of disk space, or 1.4 Gb if installed with reference documentation
Graphic library
  • OpenGL 3.3+
  • OpenGL ES 2.0+
  • Direct3D 9

For Linux:

  • GNU gcc: 4.3+
  • LLVM CLang 3.6+

For Windows: *

  • Microsoft Visual Studio 2008
  • Microsoft Visual Studio 2010 SP1
  • Microsoft Visual Studio 2012 Update 4
  • Microsoft Visual Studio 2013 Update 2
  • Microsoft Visual Studio 2015 Update 3
  • Microsoft Visual Studio 2017
  • Microsoft Visual Studio 2019
  • Intel C++ Composer XE 2013 SP1
  • GCC 4.3+ (Mingw-w64)

For OS X/macOS:

  • XCode 6.x or newer

For Android:

  • NDK r10
  • GNU gcc 4.8 or newer


The official release of OCCT for Windows contains libraries built with VC++ 2017 64 bit.


Third-party Components **
Doxygen Doxygen 1.8.5+
(building documentation)
FreeImage FreeImage 3.17.0+
(support of common graphic formats)
Freetype Freetype 2.4.11 - 2.7.1
(for text rendering)

For Desktop: Qt 4.8.6+

For Android: Qt 5.3.2+

(used by demonstration tools)

TBB TBB 4.x or 5.x
(support of muli-threading and parallel execution)

For Linux, OS X/macOS: Tcl/Tk 8.6.3+

For Windows: ActiveTcl 8.6

(used by testing tools)

VTK VTK 6.1+
(for VTK Integration Services)



The use of third-party components is governed by their corresponding licenses.

Each third-party component is needed only for relevant OCCT module or functionality and can be omitted if it is not used.


Refer to the Third-party Components page to download archives with precompiled binaries and source files of 3rd-party products for building Open CASCADE Technology and samples.

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