The Apple Store is temporarily offline, sparking speculation that Apple is about to refresh one of its product lines.

The iMac line is likely to be the reason for the temporary closure, with the last update to the iMac range more than nine months ago.

It is likely that the new iMacs will have Thunderbolt ports, which were first introduced by Apple on the MacBook Pro line in February.

Although Apple was the first to market with the high-speed data transfer Thunderbolt ports, the technology behind it comes from Intel. Thunderbolt can achieve transfer speeds of up to 10GB per second.

It is also thought that storage could increase to up to 2TB, with a RAM boost likely as well. Solid-state storage drives could also be introduced, though it seems unlikely that there will be any change to screen size.

Check back later for further updates.