Comments on: Testing websites in IE6, IE7 and IE8 on a Mac http://www.daretothink.co.uk/blog/testing-websites-in-ie6-ie7-and-ie8-on-a-mac/ Specialists in Wordpress, Websites and Print Tue, 24 Jan 2012 09:38:00 +0000 hourly 1 http://wordpress.org/?v=3.1.4 By: Spencer Sundell http://www.daretothink.co.uk/blog/testing-websites-in-ie6-ie7-and-ie8-on-a-mac/#comment-8 Spencer Sundell Tue, 14 Sep 2010 22:36:33 +0000 http://www.daretothink.co.uk/?p=1156#comment-8 It is critical to note that in reality, using IE8 in IE7 mode is *not* a 100% accurate emulation of genuine IE7. I've run into this problem myself on a number of occasions. While pretty close, there are differences in how some aspects of CSS rendering and JS parsing operate. Therefore, the best practice is to use IE8 in IE7 for rough unit testing during development, and then do a full pass using a genuine install of (real) IE7. This can be done using a virtual machine instance, as described above for IE6. This MSDN blog post has some further information along these lines: http://blogs.msdn.com/b/ie/archive/2009/03/12/site-compatibility-and-ie8.aspx Hope this helps! Regards... It is critical to note that in reality, using IE8 in IE7 mode is *not* a 100% accurate emulation of genuine IE7. I’ve run into this problem myself on a number of occasions. While pretty close, there are differences in how some aspects of CSS rendering and JS parsing operate.

Therefore, the best practice is to use IE8 in IE7 for rough unit testing during development, and then do a full pass using a genuine install of (real) IE7. This can be done using a virtual machine instance, as described above for IE6.

This MSDN blog post has some further information along these lines:
http://blogs.msdn.com/b/ie/archive/2009/03/12/site-compatibility-and-ie8.aspx

Hope this helps!

Regards…

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