While fine print on Apple’s website says Studio Display stands and VESA mount adapters are “not interchangeable,” customers can visit an Apple Store or Apple Authorized Service Provider to have their Studio Display reconfigured after purchase.
For example, if a customer bought a Studio Display with the standard tilt-adjustable stand and later decides they want to use a VESA mount adapter, they can book a service appointment with an Apple Store or Apple Authorized Service Provider and have one installed, according to internal documentation obtained by MacRumors.
Read more at MacRumors.com