Apple's online support site has been flooded with complaints and queries since its iMac consumer system was launched in the US on Saturday.
Among the messages include problems with Epson printers, the Universal Serial Bus, and machine upgrades.
Ironically one of the major complaints was that users could not get online. Some are having problems logging on to their ISPs, while others failed to keep steady connections.
Apple opened its online iMac support site on Thursday, five days after the product?s launch on Saturday. Third parties are also creating support sites of their own.
Apple says it will spend $100 million advertising and promoting the iMac between now and Christmas. US retailers are already seeing a buying bonanza.
"It's Christmas in August!" said Paul Ramirez, vice president of marketing for retailer Computer Ware. "Computer Ware sold more iMacs on Saturday than all desktop PCs combined in the month of July."
Apple's interim chief executive Steve Jobs is promising to re-stock empty shelves by this weekend but there are lingering doubts that the company will once again underestimate demand and not have enough product available.
Investors in Apple are also celebrating as the company's share price, hovering around $40, it near its highest level in three years.
Apple iMac will be launched in Europe next month.
The iMac support site is at http://www.apple.com/support/iMac
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