I’m often looking for images dimensions, and most of the time I hit the spacebar to trigger QuickLook to see them, and each time I’m disappointed because it only displays the name of the file, which, we TOTALLY do NOT care. Finally I end up opening the image with preview, just for some dimensions, it’s teh sux. So it was time to create a new Xcode project.
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Ever get tired of the spinners or progress indicators to display the loading of an image ? Well, this post is for you, I will show how to display progressively an image while it’s downloading, like we can see in our web browsers.
In this post I’m gonna talk about a flaw in the Mach-O file format which is the one used by Mac OS X.
The flaw is very old and well known.
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In OS X there is an API called KUNC (Kernel-User Notification Center)
This API is used by the kernel (typically a kext) when it wants to display notification to users or launch userland command.
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We often hear all sort of things when it comes to Mac OS X Kernel, that it’s written in C++, it’s a microkernel.. blabla…
But, what is it really ?
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Not so far ago, I was lost on the net, and I found a piece of code to simulate a Kernel Panic in the osxbook site.
Well, and as we are Mac Users, we don’t see this kind of thing very often [TROLL]Not like on Windows[/TROLL], so I decided to share this little piece of code 
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After my post on the Universal Binaries, I present you moatool, a tiny tool to manipulate Mach-O archives.
What can it do ?
- Print the fat_section of a Mach-O file, if it’s an archive.
- Split the archive into as much part as there is architecture.
- Reduce the size of the binary by removing the useless architectures, at the end it’s a simple binary.
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I have been playing with Mac OS X file format for a while now. This file format is known as Mach-O, which is resulting from the Mach project on which Mac OS is based.
First a little history, When the Macs crossed from PPC to x86, Apple introduced Universal Binaries applications (UB).
The goal of an UB application is to be able to execute on different types of architecture, the major defect is that the final application is 2 times larger, but nowadays with the disks capacity it’s not really an issue.
So how they did this ? It’s very simple, an UB application is nothing more than an archive of 2 applications with a special header.
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