Since Mountain Lion’s release last week, some NetNewsWire customers who use network proxies have told us about crashes, usually at launch, but sometimes after as much as a few minutes of network activity.
Thanks to the helpful Friends Of NetNewsWire who contacted support and allowed us to test some theories on their computers, we’ve confirmed that this is a close cousin to crashes written about by Daniel Jalkut and AgileBits. Third-party apps are affected under 10.8.0, but we’ve also heard about similar trouble affecting Safari 6.
We believe the instability is affecting a few percent of our users, but it’s occurring too deep in the bowels of the networking stack to be fixable on our end, leaving us dependent on Apple to correct it in 10.8.1. However, disabling automatic proxy detection has thus far proven a successful workaround. If you’re seeing these crashes, here’s how you can put the fix into effect:
- Open System Preferences, and click Network
- Click the “Advanced” button in the lower right corner, with your favorite network interface selected
- Click the “Proxies” tab
- Uncheck “Auto Proxy Discovery” and “Automatic Proxy Configuration” (here’s a screenshot)
- Click “OK” to close the Advanced sheet
- Click “Apply” to update your network settings
Note, of course, that anyone whose network environment requires an automatically detected proxy server will be ill-served by turning this off. You could be solving the crash problem at the cost of breaking your internet access. This advice is intended as a short-term fix for people who’ve enabled proxy detection just in case, or who only need it part-time.
We apologize to anyone who’s being inconvenienced by this glitch, and we are eagerly anticipating a permanent fix from Apple.