The New York Post said McCarthy arrived Sunday night and headed to In Touch magazine's Video Music Awards after-party at the Finale nightclub.
"She literally went straight from the airport to her new apartment to drop off her belongings, and then got in a cab to the party," a source told the Post.
McCarthy will join Barbara Walters, Whoopi Goldberg and Sherri Shepherd as panelists on "The View" for the daytime chat show's 17th season. Longtime co-hosts Joy Behar and Elisabeth Hasselbeck left last season.
Swim Week Miami Beach 2014 [PHOTOS]