Now that Apple finally came out with the (iPphone-like) LED backlighting on its 1920 X 1200 pixel 17" display, I'm writing this on my new 17", 2.5GHz, 4GB Macbook Pro -- over my home wireless network -- while Time Machine backs up my MBP wirelessly to my 1TB Time Capsule. On the left side of my display is the Mac Desktop (with the dock hiding along the left side) and on the right is Windows XP. (Vista? NO WAY!!!)
Unfortunately, the super screen resolution is so high that FR text is tiny and difficult for these old eyes to read. Fortunately, since Apple (who controls the hardware and software) has thoughtfully added the "iPhone touch" to my laptop, all I have to do is put two fingers on my touchpad, spread them apart, and ZOOM -- nice big, readable text! (BTW, it is also nice to have the screen real estate to have the FR forum on the left and the FR "slave screen" [zoomed] on the right.)
I also have a Dell Laptop here running XP and ArcGIS. What a kludge! That won't last long, because ArcGIS will soon be running on the MacBook Pro, and the Dell will go to the grandkids as a toy for playing games...
Unfortunately, the super screen resolution is so high that FR text is tiny and difficult for these old eyes to read. Fortunately, since Apple (who controls the hardware and software) has thoughtfully added the "iPhone touch" to my laptop, all I have to do is put two fingers on my touchpad, spread them apart, and ZOOM -- nice big, readable text! (BTW, it is also nice to have the screen real estate to have the FR forum on the left and the FR "slave screen" [zoomed] on the right.)
The Zoom feature is also available on standard OS X.4 and OS X.5 Macs using the keyboard and the scroll ball or wheel on the mouse. Simple hold down the Control Key and scroll in or out using the ball or wheel. The main problem is that you have to move around the resulting zoomed in screen. The method of scrolling around can be changed in the Systems Preferences/Keyboard & Mouse/Mouse/ and then the Zoom options to set it among "Continuously with pointer" (the default), "Only when the pointer reaches an edge" (my preference), or "So the pointer is at or near the center of the image." You can also set it to smooth images... resolution independence.
You can also press Command Key + or - to increase the text size in a specific windows for that session to increase or decrease text size.
A better solution for you might be to select "Customize Toolbar..." under Safari's View menu choice, and add the text sizing tool. It allows you to increase the size of the text in that particular window for that session. Each click increases or decreases the font size of every font on the page.
The drawback of those two methods of font size increase, is that some poorly designed webpages are designed only for specific font sizes and changing the fonts can cause text to overlap other text or to extend beyond the bounds of the intended text field.