The syncing takes ages and I'm wondering if it's possible to deploy a smartcontract in Mist while its not fully synced. my current status

  • No, I still want to deploy it on Mist
    – Gabriel
    Jan 8 '18 at 15:14
  • The linked question answer your question: it is not possible to deploy a contract without a fully synchronized node. If you insist on using Mist you can try with launching geth in "light" mode, but I've never tested it to deploy a contract.
    – Ismael
    Jan 8 '18 at 16:44