The images come ...

zyGrib for Mac now really "Apple like"

zygribzyGrib, the GRIB weather file viewer developed for Linux and well-known PC world, been ported to Mac, since version 5.0, is a real progress compared to earlier versions. Since early 2011 it is distributed in executable version for Mac (Intel) ready to use, as a package in a disk image (.dmg).

We must welcome the community of this development that makes a great work for the greater benefit of boaters. Free Software opensource, zyGrib is licensed under the GNU GPL v3. zyGrib allows the display of a large number of GRIB files, from many weather forecasting models .. It also allows automated requests generated by the application.


Nothing special : you open the disk image, you double-click the package and follow the procedure, like most Mac OS X app..


We find the Cocoa user interface, with its standard menu bar, a toolbar to organize map and data.

zygribLeft, a pannel that can be moved out with digital data available at the cursor location. On the right a color scale legend for the data representation on the map, depending on the type of data displayed. Down a slider time forecasts of the current file. That's simple, ergonomic and effective. The menu " Data > Options " has numerous display options for easy reading.

At any point on the map, an Right click opens a window called "Météotable" showing the forecasts at the place in digital form :


Requests and data server

The menu " File > Download GRIB "To select the file type and options depending on the model :

zygribFinally at any time " File > GRIB server status "Lets you know the status of the various files available on the server :


This application is far superior to the viewer GribView, alternative even for free on Mac. I only noted some working details to improve, i.e. zooming with the scroll wheel which is not linear. A small display bug which also requires uncheck and then recheck the menu " Data " some data, as pressure, for the isobars are displayed on the map. But this is relatively minor in terms of the richness of this application.

Well done !

See the website : GRIB Weather



  1. GUILLAUME Jean-laude this:

    Just for information Zygrib and iridium.
    After installing the Mac driver for iridium you can log on without iridium particular mailbox and make a direct request from zygrib. It's not very fast and this can be expensive but it works. 1 file obtained by 2K 1'26» including 12″ d’authentification de l’iridium.