Calibrating the iPad display

As I'm using the iPad with the wonderful Air-Display from Avatron, I was wondering, if I could calibrate the display to get even better color accuracy when editing photos "in the field" on my Macbook Air.

Turns out, I can.

Here's how to do it.

First activate Air Display and make sure you don't select "use Retina Resolution if available" or otherwise you'll end up with a Spyder3 window that is far too small to be of any use. After calibration turn it back on again as it is just marvelous to look at pictures on a nearly 300PPI display.

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Set the brightness of your iPad to a mid-range level. Cranking it all the way up may look great, but tends to seriously fuck up the calibration and gives me a headache.

Now fire up the Spyder3 application (or whatever software you use) and select your iPad as calibration-target. The application window should move to the iPad display.

Lay the iPad flat-down, place the sensor on it and start the calibration.

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That's it. Just wait a few minutes and you'll have your color-profile.


I think there really is no need to go through all of this. The calibrated output varies so little from the factory preset, that you'll only see a difference under optimal lighting conditions and in a direct comparison.

The iPad display (at least from the iPad 3) is just fantastic. Color reproduction even for highly saturated colors is accurate and the gamut is mind blowing.

Just take a look at these charts:

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Red: iPad 3, blue: Apple LED Cinema Display 27"

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Red: iPad 3, blue: Wacom Cintiq 24HD

Spyder3Elite 4 0 2

Red: iPad 3, green: sRGB, purple: AdobeRGB (mostly NTSC)

Remarks to a small percentage of readers: This process does not calibrate your iPad display per se. It only works when acting as an external display with Air Display. There is no need to tell me this in the comments. This may be what you're looking for: Datacolor Spyder Gallery.

Also, you do not have to ask me "Why did you do this when you say later there is no need?". There are other ways to prove that you're an idiot. Be creative.

Using the iPhone configuration utility for troubleshooting

Apple released it's iPhone Configuration Utility 1.0.1 last week.

Although it isn't designed directly for the end-user it comes quite handy when you have to troubleshoot your iPhone.

Essentially it provides two functions that are very useful for this purpose:

1. You can uninstall applications on your phone directly from your computer, even when the iPhone doesn't boot up to springboard. Sometimes a 3rd party app causes errors that prevent your phone from booting. Removing it solves the problem most of the time.

2. It gives you an easy access to the iPhone's console log, showing application errors, general errors and a crap-load of other diagnostic stuff like failed network login attempts, mail download problems... You name it.

The tool is available as an OSX ONLY download here.

How to fix mozy error: "Database locked"

If your installation of Mozy just recently stopped working, and you saw something like

Database locked

in your Mozy-logfile, continue reading.

I don't know what exactly causes this error, but I can tell you what not: Permission-issues or a bad harddrive.

The method described below is safe, doesn't delete any of your files on the mozy server and best of all, all the files already uploaded are still there and will be recognized. So if you have like 600GB on Mozy like me, you don't need to worry having them to upload again.

Ok, here we go:

1. Copy the file "state.db" from the folder "Library/Application Support/Mozy/" to a nice and warm place, like your desktop.

2. Select "Configuration" from your Mozymenu and make a note of every Custom-Folder you are backing up right now (collections).

3. Select "Uninstall Mozy" from the menubar. If Mozy asks if you want to keep your existing logs and configuration answer NO.

4. Reboot your computer and make sure every trace of Mozy is gone (especially the "Library/Application Support/Mozy" directory).

5. Download latest version of Mozy from and install it.

6. When asked to configure your backup, go ahead and recreate all custom directory entries

7. Voila, everything should be back to normal. Run a backup, wait for it to finish and then trash your old state.db

If anything should go wrong, remember, you can always revert back to the state before, by copying the saved state.db to the directory mentioned above.

Please leave a comment if this fix worked for you! Thx.


Finally, AppleJack compatible with Leopard

I hope you never run into a situation where your Mac does not boot fully into the finder, but when you are, you can be assured of not having a bootdisk handy...

So here's the solution: "Applejack" by Kristofer Widholm


AppleJack is a user friendly troubleshooting assistant for Mac OS X. With AppleJack you can troubleshoot a computer even if you can't load the GUI, or don't have a startup CD handy. AppleJack runs in Single User Mode and is menu-based for ease of use.

You can use it to repair your disk, permissions, validate and fix the system's preference files and clear your (possibly corrupted) cache.

Just download it, install it onto your system disk and the next time you're running into trouble, just fire up the Single-User Mode of your MAC by holding command + s on bootup. Type "applejack" or "applejack auto" and let the magic begin.

I used it on my Tiger System quite a few times and everything turned out A-OK afterwards.

If you don' trust me, here's a list of user experiences with AppleJack.

If you need an in-depth article about troubleshooting your MAC with AppleJack, MacFixIt has a nice article on it.

Automatic podcast removal and cleanup with Cast Away

iTunes does a great job downloading and syncing podcasts to my iPods / iPhone. But what it really lacks, is some kind of management functionality to delete outdated podcasts.

Cast Away fills in the gap so far left in iTunes. It allows for the scheduled removal of podcasts on a per podcast basis with lots of options.


Get it from

Trial is available, full version is seven bucks.