Yes. Adobe creates versions of most of their products in both Windows and Mac platforms.
yes
Photoshop is a commercial product and so needs to be purchased. There is no legal way to acquire it for free. There are free alternatives to Photoshop such as Gimp.
Yes Adobe provides a trial version of Photoshop that can be downloaded (See links below).
Yes you just have to have the correct version of Photoshop for a Mac.
probably you want extract,yes you can download from adobe site
Yes you can download photoshop trial versions
Photoshop files use the extension .psd in Mac OS X.
no. you have to get the mac version of photoshop
Yes, Photoshop is software itself.
Command + Q.
the reason why you cnt find photoshop 7.0 because it really not that popular anymore but you can download photoshop cs4 trial
Go to the Adobe site. They sell all of their design products (photoshop, dreamweaver, etc) for mac os as well.