A Steam OSX client update is now available. To apply the update, click the File menu inside of Steam and then select “Check for Steam Client Updates…”. The specific changes include:

Steam

• [OSX] Improved font handling of non-english (unicode) characters
• [OSX] Restored ability to enter offline mode
• [OSX] Improved performance of in-game overlay

Source A Steam OSX client update is now available. To apply the update, click the File menu inside of Steam and then select “Check for Steam Client Updates…”. The specific changes include:

Steam

• [OSX] Improved font handling of non-english (unicode) characters
• [OSX] Restored ability to enter offline mode
• [OSX] Improved performance of in-game overlay

Source