I design this quick and clearly not perfect holder to put my MacStudio under my desk.

I used 8 threaded inserts (M5) in the four joints and some bolts to put everything together.

It's printable in two parts, joined by an 2x M3 screws.

You have tabs that are also held with M5 threaded inserts (x4) and bolts. 

The tabs are great to take the Mac out without unscrewing everything.

You need to print:

• MacStudio_Vertical Holder_25mm_v2 (x2)
• MacStudio_Vertical Holder_7.5mm_v1 (x2)
• MacStudio_Vertical Holder_Joint_v1 (4)
• MacStudio_Vertical Holder_Holding Tabs_v1 (4)

Hardware:

• Threaded insert M5 (x12)
• 35mm M5 bolts (x8)
• 20mm M5 bolts (4)
• 30mm M3 bolts + nuts (x2)

And obviously, your wood screws of choice, the holes are 4.5mm in diameter.

Also available on Onshape, search “Mac Studio holder_Vertical”.

IMPORTANT: my design was not the best on the joints, they could fit better but it works.