Not for sure about the Mac and Crossover but if you look at the bottom of the program it self, there is a info bar there. It can be configured for different things I believe but I have mine basically setup with the default settings.
Here's a screen shot of the bar I am talking about.
If you look at the 5th box over, that is my ETA for a file I am downloading now. I think you can right click on the box and configure it that way also. But I do know if you have multiple files you are downloading, if you want to find out the ETA on one file, right click on it and in the context menu, you can get the ETA to be set at the bottom for a short period of time.
Like I said, I am not real sure about right clicking and the Mac or Crossover as I know that this has been an issue in the past for Mac Users.
Anyway, hope this help somewhat...