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- MS Windows users: QGIS 2.18 (32 bit) - or - QGIS 2.18 (64 bit)
- MAC users (OS X Mountain Lion and newer): Download and install the dmg image QGIS 2.18.
- Linux users should consult the QGIS download page and follow the instructions to download the 2.18 release version for your distro.
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