Those who order a new Apple iMac can now expect its arrival within just one to three business days.

Estimated shipment times for the 21.5-inch and 27-inch models improved on Saturday from weeks to just one to three business days. Just last week, Apple’s website listed the 21.5-inch model with an estimated ship date of two to three weeks, while the pricier, 27-inch model was said to take up to a month to ship.

Supplies of the two models have been limited since they launched late last year. Back in January, Apple CEO Tim Cook acknowledged that there were “significant constraints” that prevented Cupertino from getting its new desktops to everyone who wanted them. Overall, iMac sales were down 700,000 year over year in 2012.

“We believe our Mac sales would have been much higher absent those constraints,” Cook said at the time.

Apple unveiled its new iMac lineup at its October iPad mini event, pricing the computers at $1,299 and $1,499 for the 21.5-inch or $1,799 and $1,999 for the 27-inch.

The company began selling the 21.5-inch iMac on Nov. 30. At the time, it also started taking pre-orders for the 27-inch iMac, but said it would not be available until December. By the time December rolled around, shipping times for the 27-inch model had been pushed back to January.

The 27-inch computer includes a 2,560-by-1,440 display, towering over the smaller machine’s 1,920-by-1,080 screen. Both tout a FaceTime HD camera and dual microphones, with a headphone jack, SD card, three USB ports, Thunderbolt, and Gigbit Ethernet on the back. Each comes with a wireless keyboard and magic mouse.

For more, see PCMag’s reviews of the 27-inch and 21.5-inch iMac and the slideshow above.