1

I am trying to use the "Build Virtual Raster" tool in QGIS 3 to build a mosaic. When I run the tool, I get the following message:

GDAL command output:
/bin/sh: gdalbuildvrt: command not found

gdalbuildvrt is available in my terminal, but it appears that QGIS does not know where to find it. How do I fix this?

I am running:

  • QGIS 3.0.3
  • macOS 10.13.4
5

This is a know issue, however there is a workaround described in the readme file from the installer:

QGIS 3 does not find external tools needed for Processing. Some configuration options are missing. A workaround is to use QGIS custom variables. Open QGIS Preferences → System.

  • Under the Environment section, turn on Use Custom Variables.
  • Add (+) a variable
  • Select Prepend from the Apply popup
  • Enter PATH for the variable
  • For the Value enter: /Library/Frameworks/Python.framework/Versions/3.6/bin:/Library/Frameworks/GDAL.framework/Versions/2.2/Programs:
  • Quit QGIS 3 and start it again
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