The Catan Online World client is basically ready to be run on older Macintosh computers with PPC processor and/or Mac OS 10.4 X „Tiger“. Although we recommend the use of a modern Intel based Mac with 64 bit processor (Core 2 Duo or newer) and Mac OS X 10.5 „Leopard“ (or newer).

Please note: It is highly recommended to install the latest update of Java on your Mac. On Mac OS X 10.5 you need to install at least „Java for Mac OS X 10.5 Update 4“.

You may conveniently install it through the „Software Update“ in the „Apple“ menu. Alternatively you will find it for free download at

http://www.apple.com/search/downloads/?q=java+update+4

Running the Catan Online World client on an older Macintosh Computer

You can find out about the version of Mac OS X and your type of processor you are using by clicking on „About this Mac“ in the „Apple“ menu.

If one of the following conditions is true for your Mac

• Mac OS X 10.4.x “Tiger”
• PowerPC processor
• Intel Core Duo processor (opposed to “Core 2 Duo”)

the Catan Online World client will display the error message shown below:

The COW client should preferrably be run with Java 1.6, also known as „J2SE 6“. However, Java 1.6 is available only for Macintosh Computers with Mac OS X 10.5 (or newer) and 64 bit processors (Intel Core 2 Duo or newer).

To run the COW client on a Mac with an older processor (Intel Core Duo or PowerPC) and/or Mac OS X 10.4, you can switch the COW client to a compatibility mode. Afterwards the program will also run with Java 1.5.

Please note that the optimal program execution is just possible with Java 1.6. If this should not be possible on your Mac, please follow the the following easy steps to activate the compatibility mode in the COW client.

Step 1 – Show Package Contents

Please click the „Catan Online World“ program icon with your right mouse button (or click it with the Ctrl key held down) and select „Show Package Contents“.

Step 2: Activate compatiblity mode

In the now open window you will see the application icon „Compatibility_mode_on.command“. Please open it by double-clicking it.

The following window will be displayed:

If you should want to deactivate the compatibilty mode at a later time (e.G. after migrating your user profile to a new Mac or after updating the operating system), you may do so by double clicking the application icon „Compatibility_mode_off.command“.

Afterwards please close both the window „Completed Command“ and as well as the package contents „Catan Online World“.

Step 3: The COW client runs on your Mac as well