Hello @jcieply
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. Could you give us more information here. Are you trying to sync on the mobile app or are you looking to upgrade your operating system? Do you have an older version of Quicken you're wondering what is the last OS that supports it? Once you get a chance please let us know more and we'll let you know.
Thanks,
Quicken Francisco