Hello Nancy. Welcome to our group; I am very glad that you found us. There is a lot of info in our past discussions, if you go to the discussion list, you could literally scroll through it for hours and see all of the topics we have discussed. You can also type in key words in the search box with the magnifying glass at the top of this page. For example: type in the words NEBULIZE SALINE, and discussions will pop up on that topic. That is a good one for you to learn about. There is a lot of helpful things there waiting for you. I would love to hear your feedback after you have ventured through our discussion board. Have you been seen recently for your mac?