Well, yes, but I think the issue is slightly blown out of proportion. On my 10.10.5 Macbook Air I tested quick and the issue is simply that duloxetine is not p

Well, yes, but I think the issue is slightly blown out of proportion. On my 10.10.5 Macbook Air I tested quick and the issue is simply that duloxetine is not part of the dictionary and fluoxetine is. Even as I write this post I have the red line under duloxetine. I'm not sure how the association was made on their particular computer, but it raises a good point about how the annoyances of AutoCorrect can cause some difficulty. My last name, for example, is mostly unique, but is one letter off from a type of fabric. It was mildly irksome until I had the dictionary learn my name. (At least one goof up at an airport after buying auto-corrected tickets) In this case, there is of course a simple fix, which the author should apply, and if being deployed in a work environment where the change is important, there are steps that probably should be taken to resolve such issues, and better visible custom dictionary files. (looking on various *.exchange site when searching for "bulk add words to macOS dictionary provides many solutions) So I agree, that it's a problem, but it's not intentional malice here on Apple, workarounds are available, and it's a really good feature request that ought be a pretty low hanging fruit.