Ergo Desktop Ed-Mp Mymac Kangaroo Pro MyMac Kangaroo-Unmount monitor//Dual Adjustment Work surface and monitor adjust separately giving you Dual Ergonomics Designed for iMac 24 & 27 / Cinema Display 24, 27, 30 and Thunderbolt. The newer 21.5 and 27 iMac will require a vesa adapter plate already installed from Apple for mounting purposes. Designed with a more robust guiding system to support the weight of the iMac products Main work surface measures 28 wide by 24 deep