@dan BlendSrf on Mac behaves differently then in Windows: whenever I try to create the BlendSrf by hitting my spacebar, instead of creating the BlendSrf like on Windows, it will instead clear out the fist slider value. I expect that OK is always pressed when hitting Space or Enter
When using insert on Windows, I often have to insert multiple instances of the same block. In Windows I can do this very quickly once the block I want to insert has been inserted once: just hit space two times and can insert a new instance right away. On Mac the focus is not on the apply button, but I expect the focus to be on that button.