Apple has only just released updates to its MacBook and MacBook Pro notebook computers but a series of reports over the last day point towards more updates in June.

The recently released MacBook and MacBook Pro models were updated to use Penryn; Intel’s latest processor belonging to the Santa Rosa mobile platform. The speed boost is being widely criticised as nothing special. According to Mac Rumors Apple was forced into updates due to Intel wishing to push forward with production of newer processors.

According to our sources, Apple was forced by Intel into upgrading the MacBooks at this time. Intel is aggressively phasing out the older generation 65nm Merom chips over the coming months. As a result, Apple needed to upgrade the MacBooks in the interim to maintain a proper supply.

Intel is planning to replace the Santa Rosa platform with Montevina (Centrino 2) in June of this year, with the introduction of a new platform will see the introduction of new Penryn processors.

DailyTech reports that the second-generation Penryn processors will boast a 1066MHz front-side bus and clock in as high as 2.8GHz.

It also comes as no surprise that all of Intel’s Centrino partners have indicated that they will announce notebook models based on the latest platform at the time of release.

DigiTimes also reported along the same lines on Monday, explaining that Intel is planning to very quickly phase out its Santa Rosa platform next quarter and push partners into adoption of Montevina.

Intel’s timetable seems to indicate that the company intends to drop shipments of Santa Rosa from 60% in the first quarter to just 35% in the second. The current processors are also expected to be 100% phased out before the years end.

Intel expects that around 18% of notebook shipments will be Montevina-based after the platform launch next quarter. Growing to 50% by the third quarter and 90% by the fourth.