John P. "Jack" McMahon - 88,  beloved brother of Carol (the late John) O'Grady;  loving uncle of Maureen (Jean) Hanrahan, John (Laura Nelson), Kevin (Margaret) and Dan (Ann) O'Grady;  fond great uncle of many.  Visitation Saturday for 8:30 a.m. -9:30 a.m. at Cooney Funeral Home 625 Busse Hwy, Park Ridge.   Going to  St. Robert Bellarmine for 10 a.m. Mass.  Interment Private.  Info 847-685-1002 www.cooneyfuneralhome.com