I'm trying to merge 12 .tif raster layers (raster -> misc -> build virtual raster), but keep getting this error:
Loading resulting layers The following layers were not correctly generated.
You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm."
- /var/folders/4f/3vtn5c5s7zd3qnrn03_5bc1r0000gn/T/processing_201ee1195d8f460f8c74a248f1bab91c/878b8a3be722499da52c93b6f72c083c/OUTPUT.vrt
"2018-10-19T13:21:01 INFO gdalbuildvrt -resolution average -separate -r nearest -input_file_list /var/folders/4f/3vtn5c5s7zd3qnrn03_5bc1r0000gn/T/processing_201ee1195d8f460f8c74a248f1bab91c/buildvrtInputFiles.txt /var/folders/4f/3vtn5c5s7zd3qnrn03_5bc1r0000gn/T/processing_201ee1195d8f460f8c74a248f1bab91c/523821c6a9a64cd2a7789f266b312785/OUTPUT.vrt 2018-10-19T13:21:01 INFO GDAL execution console output /bin/sh: gdalbuildvrt: command not found