Forrester Research has reversed an earlier policy, and is now encouraging companies to permit Macs in enterprise. Mac use is growing, the firm notes, despite 41 percent of polled companies not technically allowing employee-owned Macs. A number of businesses are even claiming the existence of a "gray market" of sorts, in which workers will trade tips on how to bypass restrictions on the platform. Forrester's David Johnson claims that the subversion is being aided by Apple through Genius Bars, support staff and online forums.