Mac OS X

google calender to ics with iCal

you get an invitation to a google calendar and also want it to put it into your calendar cloud of your personal iCal to sync this with your other devices of apple. NOT: download it to every device each time.

Ctrl button

You just have to hold the ctrl button, press on the icon. then a menu is opening and press on open. in the dialog there is then also a button for opening the program additionally to the cancel-button we had already.

shortcut combination

1) Smc Reset
Connect to electricity (3sec), Shift + Ctr + Alt + Power button

2) PRAM Reset
Alt + Cmd + P + R hold until start sound comes up three times


Mac black screen at boot time

There are maybe two problems that can be fixed with a key shortcut combination but they are confusing.

Manually install the Java Runtime Environment

On October 16, 2012 Apple has started to disable Java applets in Mac OS X 10.6, 10.7 and 10.8:

If you installed any maintenance updates for Mac OS X after that date, Java applets won't work.

You have to download and install the Java Runtime Environment yourself from


How to make a virtual LAN with Hamachi !

First of all, you have to download the Hamachi Client from the following link: . For that, you just have to register. The free version of Hamachi is for private use up to 16 clients only.
During the installation, Hamachi creates it’s own network adapter, which you should allow on your firewall. Once Hamachi installed, you can create a new virtual LAN only by entering an Network-ID and a Password. Give those information, to people who should join your virtual LAN. You can now use all your
Default, the clients are connected as a mesh network, but via the “LogMeIn” Homepage, you can also create “Hub-and-Spoke” and “Gateway Access networks”. The connection between the VLAN clients is made by an mediation server from the provider who creates tunnels in the IP range between the peers. The data flow between clients is peer-to-peer and 256-bit SSL encrypted.

How to use LAN services over the Internet ?

Local Networks have many advantages when it comes to more complicated services like file sharing, remote desktop, network printer usage or NAS. Of course, I could use web space like DropBox, and there might be many other ways to make LAN services available over the internet. But what I am searching for, is an all built-in solution which is secure and easy to use. I want be able to connect several clients together for my LAN services. Not at least, LAN-Party’s without all the disadvantages due do local management and mobility are one of my expectations.

Resetting PRAM (to fix iSight bug)

Before resetting the PRAM check if there could be maybe some other reasons why your iSight is not working properly. To do so you can follow the instructions of this apple support page (steps 1-3).

If your iSight is still not working (but red light is flashing) you have to reset your PRAM.
1) You have to shut down your computer.
2) For resetting you will need to press (step 4) the following keys on the keyboard:
Command, Option (german boards: alt), P and R
3) Turn on the computer.
4) Promptly press and hold the the key-combination (Command, Option, P, R). You need to do this before the gray screen appears. Keep holding the keys until the computer restarts again and you hear the start up sound for the second time. This start up sound will be louder than normal.
5) Release the keys and proceed with the log in as usual.

More info can be found here:


Problem with built-in Mac Book webcam iSight

The webcam seems to be active (red light is flashing) but it is neither possible to activate nor to deactivate the webcam. That implies that no webcam using application is able to use it, e.g. for a video conference with Skype. By trying to use the webcam via an application the statement "another program may have it in use" is prompted. I haven't figured out what causes this bug, but it can be solved by resetting the PRAM (parameter random-access memory) of your Mac Book.

Change Icon of iTunes 10 (to iTunes 9) (Mac)

Download the folder using the icon of iTunes 9:

1) First you should backup the iTunes 10 icon in case you may need it later. Open the application folder and select the iTunes application. Next open the information window of the selected application (press command-I or go to File->Get Info in the menu bar). The info window will pop up with the iTunes 10 icon at the top. Select the icon and just copy it (e.g. by pressing command-C). Create a new folder somewhere in the Finder and open the info window for it. Paste iTunes 10 icon over the default folder icon (e.g. by pressing command-p).
2) Now copy the iTunes 9 icon of the attached folder and paste it over the icon of the iTunes 10 application as done previously. If you're not fully authorized to change application folders you may need to change the access privileges at the bottom of the info window. Unlock lock and change privilege to Read & Write. You will be asked for your password. Remember to undo this changes after pasting the iTunes 9 icon.
3) The iTunes icon will not automatically change in the dock. You need to remove the icon from the Dock, start iTunes and tick the "Keep in Dock" again (right click on the icon, select options).

If you're not fully satisfied with the icon only, there is a possibility to change the whole appearance of iTunes 10. More info here:

Moreover, like explained above it works for every icon. Here are some links for downloading other icons:


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