I had posting problems too. Here is what worked for me: https://steemit.com/steemit/@hammeringtruth/can-t-post-on-steemit-won-t-post-my-fix
I had posting problems too. Here is what worked for me: https://steemit.com/steemit/@hammeringtruth/can-t-post-on-steemit-won-t-post-my-fix