I cannot up load my sketches to my Mega 2560 on my Mac, it use to be ok

For some reason the upload for my mega 2560 has stopped uploading for some reason, as far as I know nothing has changed and certainly not deliberate by me if it has changed. Any ideas?

Geoff

Please do this:

  • Attempt an upload.
  • Wait for the upload to fail.
  • Hover the mouse over the red bar at the bottomof the Arduino Web Editor that shows the error message. Click and drag it up so you can see the black console window.
  • Click the icon in the top right corner of the console that looks like two pieces of paper.
  • In a forum reply here, click on the reply field.
  • Click the </> button on the forum toolbar. This will add the forum's code tags markup to your reply.
  • Press "Ctrl + V". This will paste the upload output between the code tags.
  • Move the cursor outside of the code tags before you add any additional text to your reply.

If the length of the output exceeds the forum's 9000 character limit, save it in a .txt file and post it here as an attachment. If you click the "Reply" button you'll see the "Attachments and other options" link.