Hi To-M

Thank you for your answer.
I checked log SMB for OSX client, content error :
[2015/03/05 09:38:10.651886, 1] smbd/service.c:1114(make_connection_snum)
macbookpro-8a23 (10.1.2.11) connect to service prod-share initially as user 3d (uid=0, gid=101) (pid 28882)
[2015/03/05 09:59:24.168997, 1] smbd/process.c:457(receive_smb_talloc)
receive_smb_raw_talloc failed for client 10.1.2.11 read error = NT_STATUS_HOST_UNREACHABLE.
[2015/03/05 09:59:24.169150, 1] smbd/process.c:167(srv_send_smb)
pid[28882] Error writing 75 bytes to client 0.0.0.0. -1. (Broken pipe)
[2015/03/05 09:59:24.169259, 1] smbd/service.c:1378(close_cnum)
macbookpro-8a23 (10.1.2.11) closed connection to service prod-share
[2015/03/05 10:46:10.297927, 1] smbd/service.c:1114(make_connection_snum)
macbookpro-8a23 (10.1.2.11) connect to service prod-share initially as user 3d (uid=0, gid=101) (pid 9527)
[2015/03/05 12:22:22.773714, 1] smbd/service.c:1114(make_connection_snum)
macbookpro-8a23 (10.1.2.11) connect to service prod-share initially as user 3d (uid=0, gid=101) (pid 7883)
[2015/03/05 12:22:29.929536, 1] smbd/process.c:457(receive_smb_talloc)
receive_smb_raw_talloc failed for client 10.1.2.11 read error = NT_STATUS_CONNECTION_RESET.
[2015/03/05 12:22:29.929689, 1] smbd/process.c:167(srv_send_smb)
pid[9527] Error writing 75 bytes to client 0.0.0.0. -1. (Broken pipe)
[2015/03/05 12:22:29.929807, 1] smbd/service.c:1378(close_cnum)
macbookpro-8a23 (10.1.2.11) closed connection to service prod-share
[2015/03/05 13:21:18.008977, 1] smbd/process.c:457(receive_smb_talloc)
receive_smb_raw_talloc failed for client 10.1.2.11 read error = NT_STATUS_HOST_UNREACHABLE.
[2015/03/05 13:21:18.009153, 1] smbd/process.c:167(srv_send_smb)
pid[7883] Error writing 75 bytes to client 0.0.0.0. -1. (Broken pipe)
[2015/03/05 13:21:18.009275, 1] smbd/service.c:1378(close_cnum)
macbookpro-8a23 (10.1.2.11) closed connection to service prod-share
[2015/03/05 14:13:56.129894, 1] smbd/service.c:1114(make_connection_snum)
macbookpro-8a23 (10.1.2.11) connect to service prod-share initially as user 3d (uid=0, gid=101) (pid 14676)
[2015/03/05 17:07:35.539240, 1] smbd/service.c:1378(close_cnum)
macbookpro-8a23 (10.1.2.11) closed connection to service prod-share
Time of errors match errors from MAC.
We have several version OSX 10.8.5 10.9 10.9.5, and for each MAC we have same problem...

Thank you for your help.
Best regards,
Charlie