I can not install the presets with the installer - it runs for a while and then adds with an error message. It claims that it ran into a problem and that I should contact the vendor. Consider this done. :-)
Bother; I forgot all the details I was supposed to add to an error report:
OS X Yosemite, 10.10.1
Numerology4 Pro
Aalto 1.5.0 (AU 64)
A few people are seeing errors with presets installation. I do not know what the problem is yet. I have had people check file permissions and so forth, but there are no clues.
A solution for now: get the following zip file:
http://madronalabs.com/media/temp/Aalto_presets.zip
Unzip it, and put the resulting "Aalto" folder into ~/Library/Audio/Presets/Madrona Labs. Then you will have done what the installer does, and the presets will appear in the top menu inside Aalto.
To get to your Library folder you can hold down the Option key while selecting the “Go” menu from the Finder. Sorry this is a bit complicated, it’s Apple’s decision to make ~/Library hard to access, and why I’m moving the presets again in the next version.