Q: cannot access my iPad to mac

What does that mean exactly?

How are you trying to access it?

What happens when you try? 

Do you get any error?

I'm not sure what exactly it is that you are asking. Are you attempting to access something in your iPad with your Mac? Can you explain better what it is that you are trying to do?

See this support document for help with a disabled device. If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

This can help with a device that cannot be recognized by iTunes. If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support

Follow the steps in the support documents provided by Chris above.