Fred_vdp
10 years agoHero+
Re: Update stuck on 81%
Have you tried pausing and resuming?
This may be a stretch, but it could also be an issue on the ISP's end. My ISP doesn't allow big download from Apple and always stops the download after a certain amount has been downloaded, so every time there's a major OS X update, I have to use a VPN client to install it.