[Freesurfer] Freeview quits unexpectedly

Hello FreeSurfer developers,

I am trying to load a thickness file (ex: lh.long.thickness-avg.fwhm10.mgh) in freeview, but as soon as I click the file or press enter after the command line, the program quits unexpectedly. I can load T1, orig.mgz, .pial files, etc. without problem. But when it comes to files that came out of the long_mris_slopes command, freeview quits inevitably.

Is it a problem with freesurfer or my computer (ex: graphic card not good enough)? Do you have any idea why it keeps crashing? I am running a Macbook Air mid 2013 with OS X El Captain, 1.3 GHz Intel Core i5, 4 GB 1600 Mhz DDR3, Graphics: Intel HD Graphics 5000 1536 MB.

Regards,

Nick