TeXShopInstalling TeXShop
To install TeXShop, open the dmg and drag TeXShop to the Applications folder.
For modern TeX distributions, the Path setting preference under the "Engine" tab in TeXShop Preferences should be set to "usr/texbin". TeXShop should do this automatically. But if you are using TeXShop with an older TeX distribution or with the Fink or MacPorts distributions, you may have to reconfigure this preference. For instance, if you haven't updated TeX recently, use last year's "/usr/local/teTeX/bin/powerpc-apple-darwin-current". Replace "powerpc" with "i386" if you have an Intel processor.
After installing, users may wish to read "How Do I Configure TeXShop" in the TeXShop help section, available from the Help menu.