How to increase font size on iMac?

[Lettuce Be]

1. Start in System Preferences

System Preferences is found in upper left-hand corner, under the little Apple, click that and you'll see a drop-down menu with first one being System Preferences. Open then find Displays (usually toward the bottom), click Displays. Now you'll see Resolution, and usually "Default for Display" is checked. Check Scaled instead.

Now you can choose to increase the size of all apps at once. I use the first choice directly to the left. The largest size warns that some apps may not fit correctly. It's easy to switch back so go ahead and try each to see which works best.

If you just want it larger in an app, usually you can make an adjustment under the View tab. For instance Chrome has a Zoom In (makes text larger) or Zoom Out (text smaller) choices. It only changes for that specific page, not the entire app.

Hope this helps, and if you wanted something more specific just ask.