One question asked is there timeline software for the mac like Timemap?
https://itunes.apple.com/us/app/timeline-3d/id929188617?mt=12
http://www.tiki-toki.com/desktopapp/
https://www.aeontimeline.com/download/
After doing some googling, it looks like Bee Docs' Timeline has the OS X market sewed up:
Their software can be used in demo mode for free for 10 items.
(With some screen copying and pasting, I can image that one could do several sets of 10 and paste them together into a longer timeline. Or buy it for $40.)
If you download their trial version, it come with some sample timelines that are a bit simpler than what they show on their website.