August 2011
Intermediate to advanced
552 pages
23h 48m
English
Content preview from Advanced Mac OS X Programming: The Big Nerd Ranch GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Code Signing
You probably noticed that the keychain redisplays its authorization dialog when you run a newer version of dumpem was run. This can be annoying for the user every time they upgrade your software.
Starting in Mac OS X 10.5, Apple introduced code signing, which is a way to digitally sign application code and resources. When the user OKs a keychain authorization dialog, the system sees if the application was signed. If it is, this fact is noted. If a newer version of the application accesses the keychain, the system sees if the app is signed by the same entity that signed the prior version. If so, the system knows that both applications came from the same place and allows the keychain access to happen without interruption. Keychain ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.