Employees are not only asking IT departments for Macs at work, they’re bringing their own into the office. The Forrester report finds that 22 percent of enterprise businesses foresee the use of Macs owned by employees “increasing significantly.” But at the same time 41 percent of those same companies don’t allow those employees to access e-mail or the company network on those machines, either at the office or from home. As analyst David Johnson writes, that just encourages people to spend their own time figuring out how to bypass these rules:

That leaves a lot of employees to find their own ways to get around corporate prohibition. Companies Forrester spoke with for this document described a gray market emerging internally, where employees share tips and strategies to use their Macs at work and bypass corporate roadblocks.