Q: I cannot view the import tab

The new look is monochrome gray.  Many threads about this.  If you want Apple to hear your opinion, you have to use their approved conduit:  "Aperture➞Provide Aperture Feedback".

You can still customize what is on your Toolbar.  Right-click an empty area of the Toolbar and select "Customize".

Don't know what you mean by an import button on a tab  .

This is what it looks like now

If you don;t see that start with the steps in Aperture 3: Troubleshooting Basics

Pay particular attention to the preferences file section.

One thing you can try before that is to right click on the toolbar to bring up the toolbar editor and drag the default set of buttons to the toolbar.

regards

You have totally misunderstood me

Actually two people have totally misunderstood you, think there might be a reason for that?

When trying to import you get the port dialog on the right and buttons import checked and cancel

What is a 'port dialog' and  what does 'buttons import checked and cancel' mean?

Finally

This dialog does not appear at all

what dialog are you referring to?

Perhaps a screenshot of what you are seeing would be worthwhile.

regards

How are you bringing up the Import dialog?

Move your prefs file, restart Aperture, and report back.

Details on the official Apple trouble-shooting page.

As Kirby wrote and as I wrote in my first reply if you don;t see the correct GUI do the troubleshooting steps in the pages we both linked to.

If you don;t see that start with the steps in Aperture 3: Troubleshooting Basics

Pay special attention to the preference file stuff.

Please let us know what you find out.

Ah.  _That_ is a _key_ piece of the puzzle.  Did you just notice that?

Boot in safe mode.  Links available at this post.