In a note to analysts — as reported by “AppleInsider” (http://www.appleinsider.com) — Piper Jaffray analyst Gene Munster thinks we’ll see iMac, MacBook Pro and possibly MacBook Air updates in June and a new iPhone in October.

It’s been more than a year since the iMac and MacBook Pro lines were revamped. “AppleInsider” notes that the MB Pro “may be ripe for a major redesign as the most recent came four years ago in late 2008.”

Munster estimates worldwide Mac sales to be up about 15% year-to-year in the quarter ending in June, which amounts to 4.5 million units. Mac sales will account for about 15% of Apple’s revenue for the quarter.