My computer setup currently has three monitors: the 15.4" built-in display of my MacBook pro, a 27" Apple Thunderbolt Display connected by Thunderbolt, and a 10" Mimo Magic Touch display connected to the Thunderbolt Display via USB. The computer is running a version of OS X 10.10 Yosemite.
My computer also has a user agreement policy banner set to appear at login due to the presence of /Library/Security/PolicyBanner.rtfd. However, the Mimo monitor appears to be causing issues with the policy banner: namely, the banner is appearing partially off-screen, making the "Accept" button unclickable. I'm not sure if this is due to the smaller size of the monitor, or the atypical monitor/driver.
Furthermore, the standard accessibility functionality does not appear to work with the policy banner as far as I can tell: I can't use ⇥ to tab to the "Accept" button, nor can I just hit ↩. I've also tried various combinations of modifier keys with these options. ⌘+A (the first letter of the "Accept" button) also does not work.
Ultimately, my question is thus: is there a way to accept the policy without using the mouse and clicking on "Accept"? If not, this seems like an accessibility oversight on Apple's part, as I would imagine this is also a potential problem for users with special accessibility needs. It would also mean that you can no longer log into your mac with just a keyboard.