Early in the morning a problem occurred on my MacBook pro, my Mac app store didn’t see to load correctly. After investigating the problem online I came across with similar situations and  decided to write a post with the steps performed.

Before you perform the steps below make sure that you do not have proxy server on your mac.

Open System Preferences->Network->Advanced->Proxies

Check that you do not have a protocol selected, as the screenshot below.

proxy

Software updates using the command line

Open Terminal window

Some options require the softwareupdate command to be run as root, so you might start by using the sudo command to enter a root shell:

sudo -s

You then need to enter an administrator’s password when prompted.

You can use the -l or –list argument to see which updates are available.

softwareupdate --list

This returns a list like the following.

list
Updates that require a restart are marked with [restart].

You can use the -i or –install argument to install one or more of the available updates.

For example, to install the Remote Desktop and iTunes updates listed above, use this command:

softwareupdate --install 'Brother Printer Software Update (3.0)'

Or you can use the -a or –all argument to install all available updates:

softwareupdate --install --all

The Software Update tool will report progress as it downloads and installs the updates.
To see more options and usage instructions, type:

man softwareupdate