I have 2 computers. One is Mavericks (10.9.5) and this one is Yosemite. On Mavericks, this works flawlessly. With wine, Steam launches fine. However, there is a peculiar window showing up, and whenever I try launching a game/app, it pops the usual window with "Preparing to launch...", then it disappears and nothing happens.
The image on top shows the unusual window showing up next to the main window.
This is my setup in Wineskin of Steam (needs -no-dwrite because else, it shows blank buttons).
Reinstalling didn't help, and I figured out what the little window is. On Mavericks, it was on the navbar on top, and on yosemite, it is in this window. Clicking it shows the same options as the Steam icon on the navbar on Mavericks. Also, I may have found something related in the logs:
err:winediag:SECUR32_initNTLMSP ntlm_auth was not found or is outdated. Makesure that ntlm_auth >= 3.0.25 is in your path. Usually, you can find it in the winbind package of your distribution.
I am using OS X Yosemite (10.10.3)