With the release of OS X 10.8 (Mountain Lion), Apple introduced a new security feature called Gatekeeper, which helps you to keep your computer free of malicious software. Gatekeeper allows only software from trusted sources to be installed: Applications from the Mac App Store, and applications from registered software vendors who have built their installers with a Gatekeeper signature. As QuarkXPress 9.3 was released before Apple introduced this new feature, Gatekeeper (at its default settings) does not allow the installer for QuarkXPress 9.3 (or earlier) to launch.
However, there are two ways to install QuarkXPress 9.3 (or earlier) under Mountain Lion:

The most popular versions among the program users are 10.0, 9.3 and 8.5. From the developer: With QuarkXPress, you can communicate in all the ways you need to - and always look professional - in print and digital media, all in a single tool.

·Control + Click the installer icon and choose Open.

·Open System Preferences, click Security and Privacy, display the General tab, and then click Anywhere under Allow applications downloaded from. (After installation, be sure to return this setting to its default state.)

Alexander Graham Bell (/ ˈ ɡ r eɪ. Ə m /; March 3, 1847 – August 2, 1922) was a Scottish-born American inventor, scientist, and engineer who is credited with inventing and patenting the first practical telephone.He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885. Bell's father, grandfather, and brother had all been associated with work on elocution and speech. Story of alexander graham bell. His grandfather, Alexander Bell, was an elocution professor. Bell's mother, Eliza, was hard of hearing but became an accomplished pianist (as well as a painter), and Bell took an interest in music. Alexander Graham Bell was a Scottish-American scientist and inventor, referred to as ‘Father of the Telephone’. This biography of Alexander Bell provides detailed information about his childhood, life, achievements, works & timeline. Can You Identify These World Leaders? One of the greatest inventors of the late 19th century, Alexander. Aug 2, 1922 ( age 75 ) Most Popular #6233. Born on March 3 #18. Born in 1847 #2. Born in Scotland #27. First Name Alexander #6. Born in Edinburgh, Scotland #2. Scientist, innovator, and inventor known for patenting the first practical telephone. He also had groundbreaking work in optical telecommunications, hydrofoils, and aeronautics. Alexander Bell (1790-1865) married (1) Elizabeth Colville (died 1856), divorced 1831, had 1 daughter and 3 sons: Jane Bell (1815-1817) David Charles Bell (1817-1903?) Alexander Melville Bell (1819-1905) married (1) Eliza Grace Symonds (1809-1897) and had 3 sons: Melville James Bell (1845-1870) Alexander Graham Bell (1847-1922) married Mabel Gardiner Hubbard (1857-1923) Elsie May Bell (1878.

In a few weeks time, Quark will release a free update for QuarkXPress 9 that is compatible with Gatekeeper and has been extensively tested on Mountain Lion. That version of QuarkXPress will be the first official version supported on Mountain Lion. Until this upcoming version is released, Quark recommends that you use QuarkXPress 9.3 on Mac OS X Leopard, Snow Leopard, or Lion.

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Quark has released an update to QuarkXPress 9, bringing it to version 9.0.1.