Here is a quick shell snippet to change the time machine backup interval on OSX. The time interval is specified in seconds. If you want to change it to 4 hours open terminal and enter:
sudo defaults write /System/Library/LaunchDaemons/com.apple.backupd-auto.plist StartInterval -int 14400
You can restore the default interval with:
sudo defaults write /System/Library/LaunchDaemons/com.apple.backupd-auto.plist StartInterval -int 3600
If you are using Time Machine to backup your Mac onto a network share, you might have noticed, that since the Snow Leopard 10.6.3 update the sparsebundle image used by Time Machine has been resized to use the whole capacity of your network share.
I use a Qnap NAS as a central network storage for backing up mulitple Macs and therefore I want to define strict limits for the maximum size of each Time Machine backup. So after noticing the new image sizes, I tried to resize them with hdiutil:
hdiutil resize -size 500g MYBUNDLENAME.sparsebundleUnfortunately Time Machine resizes the image size every time it runs, so it is necessary to prevent it from resizing the image.
The image size of a sparsebundle is stored in the Info.plist file inside the bundle directory, so I tried to remove write permissions to that file from the terminal:
cd /Volumes/MYSHARE/ chmod a-w MYBUNDLENAME.sparsebundle/Info.*
This wasn’t working either, because OSX seems to reset the permissions to Info.plist automatically.
The solution which is finally working for me was to login to my Qnap box via SSH and change the permissions there via chmod:
chmod a-w MYBUNDLENAME.sparsebundle/Info.*
Now, when Time Machine starts, it tries to resize the image but fails, as the Qnap server is preventing any changes to the Info.plist file. You can see this behavior in the system.log:
23.05.10 22:29:13 com.apple.backupd[378] Resizing backup disk image from 500.0 GB to 989.8 GB 23.05.10 22:29:13 com.apple.backupd[378] Could not resize backup disk image (DIHLResizeImage returned 35)
After this logging message, the rest of the backup runs fine. For me this is a nice workaround until there is an official way to limit the backup size.
By default the terminal app in OSX is not configured the way you are used to on a Linux system. There is no color output for ls and things like page up and page down are not working via SSH. Fortunately this can be corrected with some small configuration tweaks.
The first thing is to open the prefenreces panel and set the “Pro” theme as the standard theme. I also like to activate text antialiasing. My font of choice is “Monaco 12pt.”.
To enable the page down, page up, home and end keys you need to go to the keyboard tab and set the following key actions:
Home = \033[1~
End = \033[4~
Page Up = \033[5~
Page Down = \033[6~
To activate colored output for ls with a decent color scheme that works well on a dark background, create a file .profile in your home directory with the following contents:
export CLICOLOR=1 export LSCOLORS=cxexcxdxbxfxfxbxbxcxcx
Sometimes it might be useful to reload a kernel extension in OSX without rebooting your Mac. This can be done in a terminal window with the following commands:
sudo kextunload /System/Library/Extensions/NameOfExtension.kext sudo kextload /System/Library/Extensions/NameOfExtension.kext
Replace NameOfExtension.kext with the name of the extension you want to reload.
The new 3D styled Dock in Leopard is looking very stylish, but I think the 2D style which is used by the Dock when located on the left or right screen border is more functional. It is also possible to change the Dock on the lower screen Border to the 2D look. To do this you need to open the terminal and enter:
defaults write com.apple.dock no-glass -boolean YES killall Dock
To switch back to the 3D style, you can use the following commands:
defaults write com.apple.dock no-glass -boolean NO killall Dock
This might be interesting for all of you, who want to order Leopard in Germany. If you use the following coupon code during the ordering process, you will get a 10 Euro discount on Leopard at amazon.de:
AMZNLPRDAPPL
This offer is valid until November 1st.
Today Apple officially announced that OSX 10.5 alias Leopard will hit the stores on October 26th. Leopard has more than 300 new features compared to 10.4. Take a look at the link for a nice summary of the new features. I do especially like the new Xcode features.
After working more and more with my Macbook instead of my desktop PC, I have found a couple of really nice tools for mostly all of my daily tasks. So here is a small list of tools and utilities which I basically use daily:
Well, I guess that’s basically it. I will keep you updated when I find great new tools.
Everyone has been expecting the iMac upgrade for the last couple of months and today was the day that the upgrade finally was presented at the summer Mac product press conference.
The design of the new iMac is really breathtaking. It got considerably thinner than the white model and the aluminum material marks it clearly as a model targeted at the pro market.
The internal upgrades feature a faster processor, more RAM and a bigger hard disk. But the important part for becoming an all purpose computer for work and gaming is the graphics card and I feel that Apple did not completely make their homework. The entry-level model for 1200,- EUR will come with a Radeon HD 2400 XT which is an absolutely low end graphics card that you can buy for around 60,- EUR. I mean come on Apple, you build a really great system except this graphics card which is really a bummer considering the overall price tag.
Let’s take a look at the 20″ iMac for 1500,- EUR. It will come with Intel Core2Duo 2.4GHz, 1GB RAM, 320GB harddrive and the Radeon HD 2600 Pro. Ok, this card is about twice as fast as the 2400XT and a little bit faster than the Radeon 1600 which you find in the current iMac. But when you buy this card for your PC you will find that it is still targeted towards the lower mid end market with a price tag of around 100,- EUR.
In my opinion this is really a bummer and I was definitely expecting a little bit more, let’s say something in the area of a Radeon 1950 Pro. Especially since ID software committed themselves to deliver their new titles in parallel for PCs and Mac. But hey, maybe Apple did some great things with their drivers and these cards will perform better than expected, so let’s wait for the first true reviews.