Development with Private-net on Mist (Ethereum on OSX)

When first starting Mist it will automatically start looking for peer and downloading the blocks, but what I wanted to do was just use the Mist for my own study of Ethereum development so I did not need to download the blocks at the moment.
In the Mist menu, there is a setting where you can set the network for connection, so I changed it as follows.
Develop -> Network -> Solo network
By the name I was sure it meant Private-net, but by changing the connection Mist did not show the dashboard as it supposed to.
From the same “Develop” menu you can see “Show log file” which will direct to “node.log” in the system.
As application started I could see below warning.

I also could see that database path is configured to some random test datachain and IPC is connected so no problem with geth node running on backend.
What I needed to do was make an account and start mining as Ethereum Homestead document said.
Create new account can be done from…
File -> New account
And mining can be done from….
Develop -> Start mining
Monitoring the log file helps to see if the process is completed with success.

This message will show after the success of creating new account and should be able to start mining. After mining couple ether on local network I restarted Mist and the dashboard showed up.