Rumours are doing the rounds that Apple is about to refresh its two key desktop lines: the iMac and the Mac Pro.

That conclusion comes from claims that US distributors are running low on their stock of these items as supply of current models is winnowed, it is presumed, ahead of the release of new models.

Incidentally, Apple's own website shows all the variants of both Macs will ship in 24 hours, so the manufacturer, for one, hasn't run out of them yet.

Quite what the new models will feature is anyone's guess at this stage, though faster Intel Core i5 and Core i7 processors have head the list.

Some are keenly speculating that the all-in-ones will get USB 3.0 ports, though no one appears to be claiming any of the desktops will get Blu-ray Disc drives.

Apple revamped its other desktop Mac, the Mini, in June. You can read our review of it here. ®