I think I have found out the issue.
I think Control:Mac needs to be installed on an account with 'Admin Rights' enabled.

Initially I was trying to install it on an account without admin rights following the procedure previously reported and giving permissions when requested. This was when I had the hang ups.

I tried installing on my admin account using the same procedure and was successful.

After this I tried on a non admin account and was successful
So it seems that installing on an admin account clears the path for non admin accounts.

Tony
861v6+OE34+LPS+ID41, HD621, MC200, DSP7200.2, DSP5200HC, M6, DSW, Sky HD, BDP103.