mac10.11 macbook pro question
Dust can that make a lot of cpu in mac 10.11 and why does it take for ever to download the new mac 10.111 over the internet?
Make sure your Mac meets v10.11 El Capitan requirements > Upgrade to OS X El Capitan - Apple Support
If your download speeds are less than 10Mpbs, you may have problems downloading El Capitan and using OS X Recovery