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Dear Freesurfer experts,

Please help me with this simple error for running Qdec: - First I try to open qdec: qdec &

- Then this occurs:

Library not loaded: /opt/X11/lib/libGLU.1.dylib

Referenced from: /Applications/freesurfer/bin/qdec.bin

Reason: image not found

Abort

Any ideas on how I could fix this? Thanks! All the best, Alex