No appointment is needed! Early bird gets the worm though!
For this location no you don't need an appointment. The can be a cue though. In my case I when early in the morning which allows you to get completed quickly. Also this location my opinion has excellent service. If you do decided to go early in the morning get try to get there by 6:30-6:45 and you'll be golden.
I know you can go to the lower level of the Thompson Center @ 100 W. Randolph. The other two that I know of are the Secretary of State's office Express @ 4642 W. Diversey (in the strip mall), and a Secretary of State's office @ 5400 N. Elston. These are all located in Chicago. You will most likely need to bring a social security card with you in order to get a real ID.
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