Some people were positively hot.

"If I don't get my redemption code for Mountain Lion soon, I'm gunna go to an Apple store and slap the first employee I see with an iPad!" threatened , one would hope with tongue in cheek.

Others took a conspiracy theory approach. "I reckon Apple is holding back my Mountain Lion redemption code for the lulz, to send it exactly 1 minute after I give up and pay for it," early Thursday.

It's difficult to tell how many customers are awaiting codes, but a dedicated to the topic has been viewed more than 2,600 times and currently has over 100 messages.

Several Apple blogs noted the exasperated users, too, including , which hosted an unscientific poll asking readers how long it took to receive a redemption code. The overwhelming response, chosen by over 84% of the respondents, was "24 hours plus."