Not much you can do, I think it was rumored back when, that 10.4 would include system wide font scaling, but of course here we are about out of Xes & no show.
TinkerTool has some Font changing capabilities...
Start with http://www.allaboutvision.com/cvs/computer_glasses.htm.which might be your only solution. I continually run at 2560x1440 and sit about 36" from the screen. I'm nearly 72 w/ 20/20, so use that as a benchmark.
I feel your pain Edwin.
With the 27 inch screen iMacs set at it's max. resolution, menus and text are too small to comfortably read.
Here's an easier way to deal with this.
What I did, it it made a huge difference for me is to set the display to a different resolution.
In the Prefernces Pane under Displays, I set my iMac's display resolution to 1920 x 1080.
By doing this, the Apple Menu bar is of more proportional size to the screen.
From the OS X Finder, you can now adjust the size of your icons and desktop text to suit you.
You can scale the Dock to any size you wish. Mine is set to be, somewhat smaller size than the default Dock size with icon magnification on.
You may find the 1920 x 1080 resolution more to your liking.
I am very comfortable with this size.
Edwin Law wrote:
Haven't found anythng other than cmd+ for Firefox, though.
That also works in Safari 5.1.7 and below and, I think, in Safari 6, but I hate that abominatioin. AFAICT, there's no need to change the screen's resolution, just change the Appearance text settings to suit your needs (gone in Safari 6, . This is what I'm using in the earlier versions:
BTW, there's a fix for the Safari 6 loss:
Ronald P. Regensburg wrote at MacInTouch:
Full example for proportional font:
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2StandardFontFamily 'Lucida Grande'
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2DefaultFontSize 14
Full example for fixed width font:
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2FixedFontFamily Monaco
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2DefaultFixedFontSize 11