Error al instalar Dropbox en iMac

Al instalar Dropbox, cuando lo voy a abrir, me dice "No ha sido posible iniciar Dropbox."

Y este es el texto que aparece en un enlace:

bn.BUILD_KEY: Dropbox
bn.VERSION: 3.20.1
bn.DROPBOXEXT_VERSION: failed
bn.is_frozen: True
pid: 2895
ppid: 1
uid: 501
user_info: pwd.struct_passwd(pw_name='siltola', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Siltol\xc3\xa1', pw_dir='/Users/siltola', pw_shell='/bin/bash')
effective_user_info: pwd.struct_passwd(pw_name='siltola', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Siltol\xc3\xa1', pw_dir='/Users/siltola', 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', 'juanmadelatorre', '_xcsbuildagent', '_xcscredserver'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root', 'juanmadelatorre', '_xcsbuildagent', '_xcscredserver'])
DYLD_LIBRARY_PATH: None
cwd: u'/Applications/Dropbox.app/Contents/Resources'
real_path=u'/Applications/Dropbox.app/Contents/Resources'
mode=040755 uid=501 gid=20
parent mode=040755 uid=501 gid=20
HOME: u'/Users/siltola'
appdata: u'/Users/juanmadelatorre/.dropbox/instance3'
real_path=u'/Users/juanmadelatorre/.dropbox/instance3'
not found
parent not found
dropbox_path: u'/Users/juanmadelatorre/Dropbox'
real_path=u'/Users/juanmadelatorre/Dropbox'
not found
parent not found
sys_executable: '/Applications/Dropbox.app/Contents/MacOS/python'
real_path='/Applications/Dropbox.app/Contents/MacOS/python'
mode=0100755 uid=501 gid=20
parent mode=040755 uid=501 gid=20
trace.__file__: '/Applications/Dropbox.app/Contents/Resources/lib/python2.7/site-packages.zip/dropbox/client/ui/common/boot_error.pyo'
real_path='/Applications/Dropbox.app/Contents/Resources/lib/python2.7/site-packages.zip/dropbox/client/ui/common/boot_error.pyo'
not found
parent not found
tempdir: u'/var/folders/9q/dqh9hfqn7w12j2mlt3z45mk40000gn/T'
real_path=u'/private/var/folders/9q/dqh9hfqn7w12j2mlt3z45mk40000gn/T'
mode=040700 uid=501 gid=20
parent mode=040755 uid=501 gid=20
Traceback (most recent call last):
File "dropbox/client/main.pyo", line 5220, in main_startup
File "dropbox/client/main.pyo", line 2017, in run
File "dropbox/client/main.pyo", line 1042, in startup_low
File "dropbox/client/main.pyo", line 722, in safe_makedirs
File "os.pyo", line 150, in makedirs
File "os.pyo", line 150, in makedirs
File "os.pyo", line 157, in makedirs
OSError: [Errno 13] Permission denied: '/Users/juanmadelatorre'

943e88593ef80dbe891a39a37dac93fc

 

Ayuda.