Rumours are starting to surface online that Apple's next Operating System, OS X 10.5 codenamed Leopard won't now be available until October at the earliest.

While some had predicted that the new OS would be announced next month DigiTimes – cites "industry sources" who claim the release "will be postponed until October".

The delay according to the site is to ensure Boot Camp, Apple's application that allows user to boot Windows on their Apple Macs supports Windows Vista.

However the rumour goes against previously published reports from Apple that they hope to release the OS this Spring.

Earlier this week, Piper Jaffray analyst Gene Munster told clients that he expects the new OS to ship in mid-April.

However with no final build announced and production time taking a couple of weeks to get CDs or DVDs burned boxes made and shipped to retail its looking more and more unlikely that an April release date will be on the cards.

Apple has issued no comment on this report at this time.

We will keep you posted.