jimxiv:
In fact I followed exactly what you said to do
From what you posted that's obviously not true. I thought my instructions were very clear, much more specific than what pretty much any other user on this forum would provide. I'm at a loss for what I could possibly do to improve them. If you can point out exactly which step(s) you found confusing and describe what was unclear then I am happy to improve them.
jimxiv:
I have read the rules for forum protocol and find your flip response insulting.
You're welcome to be insulted if that's what you want to do. Or you could work with me to overcome this uploading problem so you can get back to your Arduino projects. The choice is yours. I'm just a volunteer trying to help people for free in my spare time. If you don't want my help I have plenty other things I can be doing.
jimxiv:
PS Did you not know that unlike Windows,the Mac "tools" does not include Processor?
I guarantee that if you're using any recent version of the Arduino IDE and you select Tools > Board > Arduino Nano then you will indeed find a Tools > Processor menu, regardless of which OS you're using. Whether you're using a recent version of the Arduino IDE I can't say since you didn't answer my question.