Some keyboard short cuts are intecepted by Mac OS before the application. I use an Apple full-size USB keyboard on Mac OS X 10.5. Function keys like F9, F10 and F11 are intercepted by Exposé, cmd-F5 is used by Voice Over, etc. These keyboard combination should be mapped to other combinaisons. This behavior may depend on the keyboard as the new bluetooth ones have a distinct Fn key to differentiate Function keys and OS functions.
Thanks for bugreport Use Tools->Customize (or something similar on MacOS X) to remap shortcuts
IMHO this is not a LibreOffice bug but just a feature (you may call it a bad feature) of the newer MacOS X versions (IIRC, Apple changed the default behaviour in function keys in MacOS X 10.4 or so ..., adding the interception of most function keys by the OS). Therefore we can’t “fix“ this in LibreOffice. Instead, please use System Preferences > Keyboard > Keyboard Shortcuts (or similar, this depends on the MacOS version) to change the default meaning of the keyboard shortcuts and F-keys. If you disable the use of F9, F10, etc. by any other functions (like Exposé etc.), LibreOffice should be notified again about that these keys were pressed. Anyway, this is a general MacOS issue, not specific to LibreOffice. Therefore, if you have further questions, please consult some Apple service or expert. I am sorry that we can’t help you more, but this is just the truth. Thank you very much!
This breaks many LibreOffice functions in Mac OS X. For example, in LibreOffice 5.0.1.2, duplication now requires shift+f3, which doesn't work, instead of command+d, which worked.