After installation of Mountain Lion on my 2008 mac pro I immediately noticed font rendering issue, where in my experience most of the sans serif fonts in highlighted menus, in terminal and on websites appeared to be fatter, bolder, with fluffy edges and more iOS looking than my usual OSX I'm used to for years. To my surprise the usual trick of changing font smoothing by issuing command in terminal: Code: defaults -currentHost write -globalDomain AppleFontSmoothing -int 2 didn't work and I would get reply: Code: The domain/default pair of (kCFPreferencesAnyApplication, AppleFontSmoothing) does not exist despite the fact Font smoothing was enabled in System Preferences. Disabling font smoothing would revert fonts to their beautiful, smooth shape as I know it for years and smoothing tweak in terminal would work again, almost as if there was a bug and "font smoothing" setting in System Preferences of Mountain Lion worked in reverse to that of Lion - unticking would enable it, ticking would disable it. Bear with me for a second though, this post is not just about smoothing option in prefs. The weird thing is - when I popped in to discuss this issue on one of the UK computer forums, and shown them screen shots, rather large number of people said I got it all wrong, and OSX should be displaying everything in bolder font and that they never experienced it looking any different! It's a surprise to me, I have three macs at home, 7 macs at work, never experienced this font boldness bug before on any of the OSX's, to be honest, I couldn't work or stand it for more than 5 minutes, but I thought it would be interesting to see what mac community thinks about it. So, macinoshians - which of the following do you see on your Mountain Lion screens and which do you think is "normal" OSX look. Example 1 - front page of this great site in Safari: Top. Mountain Lion on my MP08 default, smoothing in System Preferences Bottom. The way Lion on my MP08 and every mac in my life see it As a benchmark - for comparison: from left to right: 1. Mountain Lion 2. Lion default/Mountain Lion with smoothing off 3. MS Windows smoothing 4. No smoothing at all Example 2: terminal (iTerm) Top. Mountain Lion default, smoothing in System Preferences on Bottom. Lion default, smoothing in System Preferences on Example 3 - fragment of steampowered "news" page: Top. Mountain Lion default, smoothing in System Preferences on Bottom. Lion default, smoothing in System Preferences on So, to me, all "top" examples look wrong. However, a lot of people I asked today claim they have never seen OSX looking any different than the "top" examples. What's your take on it - let's not quote the pictures, just point top/ML look or bottom/Lion look. If your Mountain Lion doesn't look like my screenshots, but looks like my screenshots of Lion, post it too - there will be some bug report to fill.