You will have to appear in court. You will also likely receive a civil demand from Macy's for the damaged shirt, their time,etc...minimum of a few hundred bucks.
If you have an other wise clear history, it is unlikely. Probably just a combination of probation, restitution, community service and fines.
A record of your arrest now exists. Anything more will be determined at trial.
Without knowing if Macy's participates in the Nat'l Retail Theft Database, and its rules for inclusion, we cannot say.
Not likely they would even try if you plead guilty, but whether you do that or not is your decision. You may want to try and get a consult with an attorney or if you cannot afford one, plead not guilty at your hearing and request a public defender.
Speak to an attorney.

