Build-to-order Macs where the customer has specified a 2TB hard drive have suddenly jumped from a estimated shipping time of "next business day" to a new status of 5-7 weeks, in what could be a sign of the company being hit by the ongoing global hard drive shortage. Other drive sizes are unaffected so far, and the issue only crops up on built-to-order iMacs with 2TB drive options selected, reports AppleInsider.