Hi,
I just fixed this, we forgot to update the parameter files of the tutorials (md.mesh.hemisphere does not exist anymore).
1. If you installed ISSM using svn checkout:
Please go to $ISSM_DIR/examples
svn update
2. If you installed the ISSM mac binaries:
I am rebuilding new binaries right now, they should be available in less than one hour.
Let us know if you have any other problem
Best
Mathieu