Quote Originally Posted by blamelewis View Post
just after the popup to allow network connections (a setting that's never remembered by the way, on any version I've used recently I get asked this at every launch - but that's a tangent!)
run etrecheck from
http://etresoft.com/etrecheck
to see if you have any extensions installed to block networking

report looks like this...
EtreCheck version: 2.1.8 (121)
Report generated 13 February 2015 21:06:48 GMT
Download EtreCheck from http://etresoft.com/etrecheck

Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.

Hardware Information: ℹ️
MacBook Air (11-inch, Mid 2012) (Technical Specifications)
MacBook Air - model: MacBookAir5,1
1 2 GHz Intel Core i7 CPU: 2-core
8 GB RAM
BANK 0/DIMM0
4 GB DDR3 1600 MHz ok
BANK 1/DIMM0
4 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n
Battery Health: Normal - Cycle count 614
…