Can't download the software for the HP Officejet Pro L7500 because of a network problem.

You could download the HP Driver v2.12 package from Apple. This download has drivers for a large number of HP devices including your L7580, so the download is 439MB in total.

If you don't want to use a large chunk of your monthly limit and just get the driver for your model of HP then try to add the printer later. Maybe there is just network congestion in your region and this is causing the install to fail.

I'm getting the same message in relation to attempting to load drivers for a Brother MFC. I manually found and loaded the drivers then attempted to add the printer however Preferences automatically attempts to download them again and comes up with the same error message. I can't find the location of the drivers on my computer so that I can manually direct the printer manager to use the loaded drivers. 😟

I believe Pahu is referring to his/her monthly data allowance for his/her broadband plan. For eg. for those subscribing to Bigpond 5gb, almost 500 Mg is a chunk. For those of us on higher allowances (allowances jump to at least 50gb after that) it's not even worth considering.