It looks like you are either not using a Macintosh or you are using a version of macOS older than 10.12 (Sierra). You will need to upgrade to be able to run Swift for Arduino.
Swift for Arduino costs $5 to buy a copy for unlimited use for one developer.
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Once payment is complete, Swift for Arduino will start downloading immediately. Please wait until the download is complete before disconnecting from the internet. If you have any problems with downloading a purchased copy of the software, please contact us on email@example.com explaining what happened and we will attempt to help you with your issues.
WARNING! This application only works on macOS 10.12 (Sierra) or later! If you are not currently using a mac up to this specification you probably don't want to buy the product as it won't work.
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