"Cannot find a valid peer process to connect to" VMware Workstation 10.0.1 while booting a VM

Question

I've just installed the VMware Workstation 10.0.1, but when I try to boot a virtual machine (I've created a new guest and I also have a virtual disk image of another VM), it doesn't start to run and I get this error: "Cannot find a valid peer process to connect to". I've googled around but didn't find a solution to the problem. I am using Windows 7 64 bit. I also have VirtualBox installed (maybe VMware goes in conflict with VirtualBox?).

What should I do? I need those virtual machines to run.

Answer 1

If the above solution didn't work, just restart your machine (Physical machine) and try booting again.

Answer 2

I needed to "allow" the VMware system extension (macOS warned me about this being blocked on install, but I ignored it).

In brief: System Preferences > Security and Privacy > General > Click "Allow" on the "VMware blocked" message

See accepted answer here for further details: https://superuser.com/questions/1256489/how-to-fix-vmware-fusion-pro-10-cannot-find-a-valid-peer-process-to-connect-to