Why is Asset importing slow?

I have some concerns about Asset importing. I’m at the latest Mac mini and on importing Unity’s Standard Assets. the statusbar reached about 50% after over 20 minutes.
Is that normal? It’s mainly PNGs and TGAs the importer takes forever to import. Why is that?
In the Activity Monitor the PVRTexTool spikes every now and then to over 300%

ahh I think that’s normal (even I not understand this PNG and TGA statement) but if you need fast you can use separate unity app (I mean you export the project on 1 different app without scene loading (so the process will faster)) and copy the assest to this folder ( yourgames/assest/(the folder name) in the file explorer so its dont take too long (maybe)
you understand what I mean
btw even you put the assest without assest importer you can still use that you just need to put it on the assest folder

Hmm…

Try closing everything not in use and try importing the stuff again. Maybe something’s fighting Unity’s processes. Also consider running Disk Utility for a HDD check, you might have something wrong with the file system causing this behavior.

What version of Unity are you using? Are you able to test using the latest version by any chance?