I once had issues with my apple and it came from its internal firewall... have you checked?
Then using @ in a passwd is far from being a good idea... on HP it means erase the buffer ( the typed line ...) until you are logged and have stty set...
mount -t smbfs //itransfert_cs:pa\*sswor\@d@IP/itransfert/1-Arrivees/Vers_K2 /share
or
mount -t smbfs //itransfert_cs:"pa\*sswor\@d"@IP/itransfert/1-Arrivees/Vers_K2 /share
Scott I really think we should wait to see what error message is produced... coming back to the essential, to mount you should be root no? What difference is there between a smbfs and a NFS fs from a unix point of vue when it comes to mount? To me I see no real difference so I am wondering if the user/passwd that you usually never give when you mount -t is the real issue... but I may be wrong had too much wine and fighting with a strange date bug (with cal extract in a script between AIX and HP (same script result are different and one runs the 31 and the other the 1rst Jan, days off here...)
$ who am i
scott ttys001 Dec 18 20:51
$ uname -a
Darwin Scotts-iMac.local 13.0.0 Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64 x86_64
$ mount -t smbfs //scott:scott@vma/scott /Users/scott/remote
$ ll /Users/scott/remote
total 34
dr-xr-xr-x 2 scott staff 16384 Dec 20 13:50 .
drwxr-xr-x+ 56 scott staff 1904 Dec 20 13:55 ..
-r--r--r-- 1 scott staff 10 Dec 20 13:50 hello_from_vma.txt