"I was close to recommending the firewall in app signing mode ["Set access..."], but not with this problem of breaking applications," he said. Instead, users should rely on the protection built into their routers. "If you have a wireless router between the modem and your Mac, you're fine," he said.
But even a flawed firewall isn't fatal, Mogull noted, for Mac users. "I run a firewall, but it's kind of out of habit from my days with Windows," he said. "I like that extra layer of protection." But there have been few cases where exploits have actually claimed success against Apple's systems. "There was a zero-day, but that's been patched. I don't know of any ways of getting in today." He declined to name the exploit.
"Fortunately, all of this is fixable," he said. "Apple clearly was a little rushed, but they're moving in the right direction. It's our responsibility to keep on Apple to make sure they convert these concepts into actual implementations."
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