Question : My Mac’s network connection is messed up, and I need to download software to update of fix this – what can I do ?
Answer : Since OSX 10.7 Lion, there is an easy way to do this if your networking-problem is software-related, not broken hardware.*
1- restart with the ‘CMD’ + ‘R’ keys pressed (‘Rescue Mode’)
2- then use Safari (listed as ‘online help’) to go online
3- go into Safari’s preferences and change the download folder to a USB-stick or external hard drive (just make sure it has enough space to hold the file you’re going to download)
4- go to the site you need to get the download from, and download
5- restart your Mac normally and install the download from within OSX