CUPERTINO, Calif. -- Apple reported a record second-quarter net profit of $5.99 billion, or $6.40 per diluted share, and revenue of $24.67 billion, thanks to strong sales in Macs, iPhones and iPads. These results compare with net quarterly profit of $3.07 billion, or $3.33 per diluted share, and revenue of $13.5 billion, in the year-ago quarter. International sales also helped boost profits, as they accounted for 59% of the quarter’s revenue, the company reported.