I run an Apple Mac and did both the Software Manager and the SMH10R firmware updates with no problem.
I would, however, take this opportunity to warn about an issue that may arise for Mac users: you get a message saying that the update cannot be run because it is not from an approved source. If you do, this is what you have to do:
"By default Apple has changed the security settings to only allow installation of apps from the Mac App Store and identified developers. To change this permanently or temporarily go to System Preferences > Security & Privacy. On the General Tab click the little lock in the lower left corner to unlock the general preference pane. Then select the Anywhere radio button beneath Allow applications downloaded from."
Do this, and it all works fine