Okay, thanks.
I have severe sensory processing issues, coordination issues, and bilateral arm pain. The computer issues are only the tip of the iceberg, there are other worse issues involved, but the computer issues should be fixable. I had used various fixes. I tried Onyx and Tinkertool but ran into trouble because of the painimation in Onyx and Tinkertool. I use Firefox, and avoid Safari, and have a bunch of add-ons for Firefox, but they aren't enough.
First, I wanted to clear out some of the customizations, especially involving hidden preferences, because I didn't want to create trouble for future customizations. I *think* I have cleared out the hidden customizations.
Second, I want to make things more accessible for me.
I have a lot of trouble with animation. Flashing lights, looping gifs, and zooming images are the absolute worst, but autoplaying anything, bouncing icons, shaking icons, and the NSSheets are also pretty painfully bad. I haven't been able to disable everything. Unfortunately, a lot here is embedded in OS X and a lot online is embedded in Javascript, and can't be disabled except by disabling all of Javascript. I could use less animation. I could use a clear visual separator between anything which scrolls and anything which stays put.
I also can't handle phone calls.
I also have a lot of trouble with coordination. I have trouble with anything that requires coordinating both hands at the same time. I use an external vertical mouse, which helps. I like the small keyboard. I like being able to disable tapping, pinching, etc. on the touchpad. And actually that's one reason I went with OS X instead of Linux. I have tried enhanced Dictation, but between my accent and the noise levels, it can be hard to use enhanced Dictation. I have considered Dragon several times, when it has been on sale.
I bought a Macbook with a 256 GB hard drive, but between importing from different computers, various problems, etc. I've used more than 128 GB and I don't feel like I have enough room to make dual-booting Linux practical. I wish I were able to use a more accessible desktop environment, though.