Thomson Reuters offers several EndNote Products: EndNote X7, EndNote for iPad, and EndNote Basic. See the comparison chart at the bottom of the page.
There are some known issues with EndNote X8 operating on Mac systems. Please see the comment thread on their user forums to learn more. We would recommend contacting EndNote directly if you are considering using X8 on your Mac and believe you might be susceptible to this 'crashing' issue.
EndNote X7 syncs all your citations, attachments, reference groups and annotations.
EndNote X7.5 for Windows & Mac, released 2 February 2016.
Completely free, online-only access to Endnote's basic reference manager.
With EndNote for iPad, you can sync your EndNote library across your desktop, iPad and online to always have access to your research.
Director, Library Services
Librarian, Coordinator of Reference and Instruction
Information in this guide is used from the Thomson Reuters website.