Can't connect from Win10 to Mac

Hi,

I have two computers on PC running under win10 and the other one on Mac OSX El capitan. I use Teamviewer 12

I can easily connect from the Mac to the PC but in the other side (from PC to Mac) it doesn't work, stuck with "Connexion in progress", I see nothing on the mac.
Here is messages in the log file (of the PC) :

2017/01/10 11:35:13.519  1716   588 G1   Trying connection to 539826180, mode = 1
2017/01/10 11:35:13.522  4220  4784 S0   Activating Router carrier
2017/01/10 11:35:13.522  4220  4784 S0   CProcessCommandHandlerMasterConnect[11]::CreateMasterConnect(): master6.teamviewer.com:5938, Connection 15, proxy=''
2017/01/10 11:35:13.565  4220  4784 S0   CProcessCommandHandlerMasterConnect[11]::HandleMasterConnect(): Sending MasterCommand client=TV&connectionmode=1&f=RequestRoute2&homeserver=&ic=579382944&id=247017573&id1=247017573&id2=539826180&mid=va5485d15a10b642361691c7bda71d5e6ecb1d74f094340cf258caf211d3921c067d8d730b877<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~0dd0c5b4e712d7cef7750d93b4e6b006&midv=2&v=12.0.72365 
2017/01/10 11:35:13.625  4220  4776 S0   CProcessCommandHandlerMasterConnect[11]::ReceivedMasterResponse(): Received MasterCommand CONNECT@37.252.230.26_10800_128000_779847672_539826180_10000__1_0_16778176_128000_16778176:128000;2147483647:1280000;4:640000_1943797625_1943797625_server22409.teamviewer.com_ef/bc0g=_ef/bc0g=
2017/01/10 11:35:13.625  4220  4776 S0!  TcpCarrierBase[11]::SendCompleteQueue(): No Connections, Type_Tcp, Dir_Outgoing, Ending 0, SendQueue 1, CurrentSendQueue 0, SendCache 0
2017/01/10 11:35:13.626  4220  4776 S0   Activating Router carrier
2017/01/10 11:35:13.626  4220  4776 S0   CommandHandlerRouting[12]::CreateActiveSession(): outgoing session to 539826180 via server22409.teamviewer.com, protocol Tcp
2017/01/10 11:35:13.626  4220  4776 S0   Carrier[11]::EndCarrierInternal(): ClientID: 0 SupportsEndSession: 0, SupportsCCmd2: 0, SessionType_MasterConnect, SendQueue: 0 (4 Bytes), CurrentSendQueue: 0 (0 Bytes), SendCache: 0 (0 Bytes)
2017/01/10 11:35:14.423  4220  4772 S0   Negotiating session encryption: server hello received
2017/01/10 11:35:14.519  4220  4772 S0   Negotiating session encryption: server handshake received, encryption established with AES key length 256

 Any ideas ?

Thank you for your help