SOS Impossible demarrer DROPBOX Mac OS 10.8.5

bn.BUILD_KEY: Dropbox
bn.VERSION: 36.4.22
bn.DROPBOXEXT_VERSION: failed
bn.is_frozen: True
machine_id: failed
pid: 1572
ppid: 158
uid: 501
user_info: pwd.struct_passwd(pw_name='fabienneguicheneuy', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Fabienne Guicheneuy', pw_dir='/Volumes/Mac/Users/fabienneguicheneuy', pw_shell='/bin/bash')
effective_user_info: pwd.struct_passwd(pw_name='fabienneguicheneuy', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Fabienne Guicheneuy', pw_dir='/Volumes/Mac/Users/fabienneguicheneuy', pw_shell='/bin/bash')
euid: 501
gid: 20
egid: 20
group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root'])
DYLD_LIBRARY_PATH: None
cwd: u'/'
     real_path='/'
               mode=041775    uid=0    gid=80
     parent    mode=041775    uid=0    gid=80
HOME: u'/Volumes/Mac/Users/fabienneguicheneuy'
appdata: u'/Volumes/Macintosh HD/Users/fabienneguicheneuy/.dropbox/instance2'
         real_path=u'/Volumes/Macintosh HD/Users/fabienneguicheneuy/.dropbox/instance2'
                   not found
         parent    not found
dropbox_path: u'/Volumes/Macintosh HD/Users/fabienneguicheneuy/Dropbox'
              real_path=u'/Volumes/Macintosh HD/Users/fabienneguicheneuy/Dropbox'
                        not found
              parent    not found
sys_executable: '/Applications/Dropbox.app/Contents/MacOS/Dropbox'
                real_path='/Applications/Dropbox.app/Contents/MacOS/Dropbox'
                          mode=0100755    uid=501    gid=20
                parent    mode=040755    uid=501    gid=20
trace.__file__: '/Applications/Dropbox.app/Contents/Resources/python-resources/python-packages-27.zip/dropbox/client/ui/common/boot_error.pyc'
                real_path='/Applications/Dropbox.app/Contents/Resources/python-resources/python-packages-27.zip/dropbox/client/ui/common/boot_error.pyc'
                          not found
                parent    not found
tempdir: u'/var/folders/tn/pbh8skkn44z3glbs9z563rsm0000gn/T'
         real_path=u'/private/var/folders/tn/pbh8skkn44z3glbs9z563rsm0000gn/T'
                   mode=040700    uid=501    gid=20
         parent    mode=040755    uid=501    gid=20
Traceback (most recent call last):
  File "dropbox/client/main.pyc", line 5998, in main_startup
  File "dropbox/client/main.pyc", line 2330, in run
  File "dropbox/client/main.pyc", line 1423, in startup_low
  File "dropbox/client/main.pyc", line 1038, in safe_makedirs
  File "os.pyc", line 150, in makedirs
  File "os.pyc", line 150, in makedirs
  File "os.pyc", line 150, in makedirs
  File "os.pyc", line 157, in makedirs
OSError: [Errno 13] Permission denied: '/Volumes/Macintosh HD/Users'