After updating to Yosemite the only trouble I have is that VMWare Fusion (Professional Version 5.0.5 if that helps) fails to start showing following error:
Could not open /dev/vmmon: No such file or directory. Please make surethat the kernel module `vmmon' is loaded.
I've tried to google the issue but the only relevant thing found was this:
The Mac has a certain amount of devices it can register in the /dev/ directory ..., virtual devices like virtualization software and VPN clients also create devices in this directory quickly filling up the number to the limit. To solve this I went through my installed applications and removed every VPN client and VM software that I don’t require any longer and rebooted my machine. After the reboot everything worked immediately.
But even if this is true, I just can not get rid of my VPN client for example. So, I still have no idea what steps I should take to solve the issue. I'll be very much obliged for any hint how to fix this problem.