OS X Yosemite features a dark mode option. If you turn this on, your menus, Dock and application switcher (the bezel that displays when you press Command-Tab) will be black, and not translucent.
To activate this, open System Preferences, then click on General. Check Use dark menu bar and Dock.

You can see above what the menus look like. I don’t find this very usable; the contrast is too harsh (it’s always harder reading light text on a dark background than the contrary), and many menu extras don’t display correctly, including some of Apple’s. But if you like this interface, it’s just a click away.
Which Apple extra don’t display right? 3rd party ones have been updating too so most of what I have works:
SABnzbd+ – Icon/Status display stays black, menus work.
MagicPrefs – Icon needs work, menus work
Evernote Helper – Icon needs work, doesn’t use normal menu
Quicksilver – Icon needs work, menus ok
TextExpander – Updated and works
Creative Cloud – Icon needs work, doesn’t use normal drop-down menu but an app-type window
Dropbox – Updated and works
Divvy – Updated and works
Default Folder X – Updated and works
Cloud Clip – Icon needs work, menus work but the icons in the menus need work
gfxCardStatus – Works
ClipboardHistory – Icon needs work, menus ok
Twitter – Updated and works
Skype – Updated and works
AirPlay – Works
iStat Menus – Updated and works (5.02 fixed the menu transparency issues…they are not transparent like others)
Time Machine – Works
Apple VPN – Works
Sound – Works
Bluetooth – Works
WiFi – Works
Battery – Works
Clock – Works
Just curious about that blanket statement…
And I can read the menus just fine on all my systems (with 41 year-old eyes and no glasses)
15-inch mid-2012 Retina MacBook Pro
2011 Mac mini on a 55″ Sony HDTV (HTPC)
2012 Mac mini on a 47″ LG HDTV (HTPC)
2009 Mac Pro w/3 1920 x 1080 monitors
Which Apple extra don’t display right? 3rd party ones have been updating too so most of what I have works:
SABnzbd+ – Icon/Status display stays black, menus work.
MagicPrefs – Icon needs work, menus work
Evernote Helper – Icon needs work, doesn’t use normal menu
Quicksilver – Icon needs work, menus ok
TextExpander – Updated and works
Creative Cloud – Icon needs work, doesn’t use normal drop-down menu but an app-type window
Dropbox – Updated and works
Divvy – Updated and works
Default Folder X – Updated and works
Cloud Clip – Icon needs work, menus work but the icons in the menus need work
gfxCardStatus – Works
ClipboardHistory – Icon needs work, menus ok
Twitter – Updated and works
Skype – Updated and works
AirPlay – Works
iStat Menus – Updated and works (5.02 fixed the menu transparency issues…they are not transparent like others)
Time Machine – Works
Apple VPN – Works
Sound – Works
Bluetooth – Works
WiFi – Works
Battery – Works
Clock – Works
Just curious about that blanket statement…
And I can read the menus just fine on all my systems (with 41 year-old eyes and no glasses)
15-inch mid-2012 Retina MacBook Pro
2011 Mac mini on a 55″ Sony HDTV (HTPC)
2012 Mac mini on a 47″ LG HDTV (HTPC)
2009 Mac Pro w/3 1920 x 1080 monitors