Can a person collect unemployment if they quit their job after not getting paid for 2 pay periods?

employer who hasn't paid her or other employees for two pay cycles, claiming that he is waiting for a check from a client. My sister-in-law is an hourly employee (not on a set salary), and her pay period is every two weeks. Not sure if this matters, but she is also not a member of a union or an independent contractor or freelancer, and she has worked for this employer for more than a year.

If she were to quit her job because the employer is not paying her paychecks, can she collect unemployment benefits in Florida? Are there additional steps she might take before quitting her job (if she chooses to quit) and before she goes to an attorney or files for unemployment benefits?