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Mac OS X

Mac OS X is a series of Unix oriented operating systems developed by Apple Inc., providing Aqua as its native graphical user interface (GUI), including its Mac look-and-feel buttons, windows and other widgets.

Apart from Aqua, Mac OS X can also support other more portable user interfaces based on X11, to run applications that may look less Mac-like, but that are easier to port to other platforms. Huygens is only available in Mac as an X11 application, and therefore your need to have X11 installed on your Mac in order to run Huygens. We highly recommend to use the XQuartz package.

OS X 10.10 Yosemite, OS X 10.11 El Capitan, Mac OS Sierra 10.12

The latest version of XQuartz can be downloaded from here.
When you install XQuartz for the first time, there should be no problem running the latest version of Huygens.
If you have upgraded to Yosemite, El Capitan or Sierra from a previous Mac OS and had XQuartz previously installed, then the upgrade causes the symbolic link to the X11 directory to break. This is a known issue with the Mac OS upgrade. Because Huygens depends on X11 in Mac, Huygens will not be able to run at first.
The easiest solution is to first un-install XQuartz from your Mac and then re-install XQuartz.

If you still experience any problems with Huygens, even after re-installing XQuartz, then please contact SVI.

OS X Lion, Mountain Lion and Mavericks (X11 & Aqua 64 bit)


Up to a few years ago we supported two Mac versions of the Huygens software. One version used the native Mac OS libraries for showing the graphical user interface, this is the ‘Aqua version’ of the Huygens suite. The second version uses an OS independent library for showing the GUI, this version requires XQuartz (an X11 version for Mac OS X officially supported by Apple) and is referred to as the ‘X11 version’ in our documentation.

On the Mavericks version of Mac OS X, the performance and usability of the Aqua version was not up to our quality standards. The short technical explanation is that the native Apple libraries which we are forced to use for the Aqua version are unstable and behave differently as the same libraries on the Mac OS X XQuartz, Windows and Linux versions of Huygens. The Aqua version has therefore become unusable on at least Mac OS X Mavericks. Furthermore, a disadvantage of the Aqua version is its lower performance as compared to the XQuartz version.

Therefore the current Huygens release, only supports the X11 version, the Aqua version no longer supported. As a side benefit, this resulted in a performance and stability boost for the new Huygens version!

To be able to run the latest version of Huygens, you will need an X11 server on your machine. If you currently do not have an X11 server, you can install XQuartz, which is freely available and the preferred X11 server for Huygens. The installation should be straightforward.

In order make optimal use of the Huygens software, we recommend setting the xQuartz X11 preferences to send Alt key symbols when pressing the Option key. This allows you to expand the usability with Alt hotkeys on Mac OSX.
Mac XQuartz Prefs
Another option for using the Huygens software on the MacOS 10.7, 10.8 and 10.9 is to run it under Windows/Linux in Boot Camp. More information can be found here

Contact Information

Scientific Volume Imaging B.V.

Laapersveld 63
1213 VB Hilversum
The Netherlands


Phone: +31 (0)35 64216 26
Fax: +31 (0)35 683 7971
E-mail: info at svi.nl

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