Our website provides a free download of Due 1.5.1 for Mac. The program is included in Productivity Tools. The actual developer of this software for Mac is Phocus LLP.
From the developer:
Type "Make dinner reservation at 9am tomorrow" and your reminder is set for 9 AM tomorrow.
"Cancel subscription in 1 month" and you get a buzz a month later.
Just tell Due in your own words what you'd like to do, and when you'd like to be reminded.*
There are no awkward date pickers to fight with, nor rigid date and time format to follow.
Your reminder is set as soon as you're done typing.
You may want to check out more Mac applications, such as Gestational Age, Chronicle - Bill Management or NotifyMe Desktop, which might be similar to Due.