Apple is offering the new iMac configuration

According to Macworld UK, Apple introduced a new configuration for its 21.5-inch and 27-inch iMacs, which allows customers to select VESA adapter instead of the standard base. The 40 dollars configuration allows users to mount their iMac on the walls or other vertical surfaces, but the device should be configured at the time of purchase.

"The iMac with Built-in VESA Mount Adapter is ready to pair with your favorite VESA-compatible wall mount, desk mount, or articulating arm (sold separately). This iMac doesn't include a stand, so a mount is required. If you don't already have a mount, you can purchase one when you configure your iMac."

Apple is currently sets deadline for delivery of 7-10 business days for the iMac with VESA adapter, compared with the immediate availability of standard models.