Mac/Win Shared Folders, Bidirectional Copy/Past, and improved graphic drivers are available to VirtualBox when you install "Guest Additions".

Get the ISO from VirtualBox for example (I don't have permission to post the actual URL) so here it is with some extra spaces: download.virtualbox .org /virtualbox/ 4.3.6/ VBoxGuestAdditions_4.3.6.iso

Download to Mac and use vbox to mount it to CD drive of your virtual windows machine and install. Then when you select a folder to share from your mac under VirtualBox it shows up under "computer" as a network location with a drive letter assigned!

Also turn on bidirectional copy paste under virtual box general settings --> advanced.

I haven't tried it, but Guest Additions also allows an experimental DirectX 3D mode, to be installed in safe mode, which might work even better for C2?

Having success so far with following setup...

My Setup

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MacBook Pro (15" Mid 2010) with 4gb RAM

Mac OS X 10.9 Mavericks

VirtualBox 4.3.6 (Free from Oracle!)

Windows 7 Pro

Allocated 2gb RAM for OS X and 2gb RAM for Windows 7

Construct 2 Release 152 (trying free edition for now)

Firefox 26.0 (to run the Layouts)

Results

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* Upon install, Construct 2 suggests getting latest video drivers which of course won't work, so didn't change them. However, I did up the resolution in the control panel.

* Loaded and ran both included demos successfully in C2 running through Firefox. However the frame rate and sound may be been a bit laggy. And, one of the demos gave a message about OpenGL not working but that was to be expected. Demo still played ok.

* Tested the problem experienced by the other person who tried VirtualBox

and it worked for my setup.   Namely, I started a new project, dragged a PNG into it and ran layout -- displayed the image as expected (no gray box problems)

I am new to C2 so I have not put it through its paces, but there is no weirdness yet at this point.

Because of the impact of memory on speed in both my operating systems, I just ordered 8gb (2x4gb) RAM for about $60 to replace my 4gb. Because I think my OS X 10.9 especially is cramped running with only 2gb available to it. (But it does still seem usable with only 4gb total.)

I will update if I find any problems. Or let me know if there is anything specific I should test.

I also own VMWARE Fusion but its version is outdated and I can't run fusion under 10.9 without updating to version 6 and paying for a new license. So I am happy that VirtualBox seems to be a good free alternative. Just have to supply your own Windows OS license.