Wacom Intuos

I have bought Wacom Intuos Tablet approximately 1 year ago. It was working really good at the beginning, then i taked a break of digital drawing like 5 or 6 months. I tried to use my tablet 4 days ago, but it didn't worked. It connects my computer, everything is normal but system errors and pen doesn't work. Error says that accessibility isn't checked but i checked it. I uninstalled and installed again the wacom driver and software. Also my mac is installed. I don't know what to do. Looking forward for your answers.