I am using a Mac 2010 27 inch running MacOS 10.12 for other purposes, though not Aeon, and it is sluggish, full-stop! Which version of OS-X/MacOS are you running on your machine? I would also suggest using an application like Cocktail or Onyx and also perhaps do a safe boot to clean up the system, clear caches and stamp on any gremlins that may be lurking. Mark

Hi, How fast Aeon Timeline runs does depend on the specifications of your machine and the amount of data that you are have in the timeline, however in our next update (which should be released soon) we have made some speed improvements, especially for timelines with a large amount of events and when using relationship view. Jess