BlueM
dd and du do not seem to click-and-hold on 10.14.6 Mojave...
I've tested with a few other similar tools (not as elegant as yours) that do work. So Apple hasn't disabled some feature.
I've installed from homebrew, and it gives me this version:
cliclick 4.0.1, 2018-04-10
The cursor visibly moves with all my commands. But clicks do not happen. I've tried inserting high wait times between dd and du, I've tried using the -e switch all the way up to 9. I've confirmed manually that there is text to select/highlight (eyeballing it, but I'm not off more than 50 pixels plus-minus on either coordinate). I've tried a m/move command in between rather than a du, and then I do a du:.
I thought at first this might be the app I was using it on (not Applescriptable), but even in Firefox I get the same results. I'm likely doing something dumb, but I can't figure out what that might be.
So basically, you would like to select text. I’ve just tested this with text in this issue (with Chrome, on macOS 10.15.6, then also tested successfully with Firefox), and this was my first attempt, which does work:
cliclick c:239,447 dd:. du:+309,+0
Which means it’s either the command you used, and/or the application you tested it with and/or (although IMHO not likely) the macOS version.
I had the same issue on macOS Sonoma. It appeared to be related to Stage Manager being active. After switchin of Stage Manager there is no problem at all. The switching on and off can be done in Applescript: do shell script "defaults write com.apple.WindowManager GloballyEnabled -bool false" do shell script "defaults write com.apple.WindowManager GloballyEnabled -bool true"
