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<blockquote data-quote="dtravis7" data-source="post: 1627277" data-attributes="member: 8287">A 2007 iMac will run Lion or for that matter Yosemite just fine as I have one here!&nbsp; 2GB Ram though for Yosemite would be very lean.&nbsp; The very fact Yosemite installed is proof it will run.&nbsp; Yosemite will not even let you install on a non supported Mac.If the OP sees this before his keyboard arrives, to do a PRAM (parameter RAM BTW) using a Windows keyboard, Here are the keys.&nbsp; (As you know to do it on a Mac keyboard you hold Command+Option+P+R down all at the same time and keep them down till you hear 2-3 apple chimes.)On a Windows keyboard the LEFT Windows key is Command and the ALT key is OPTION.&nbsp; So you would press Windows+ALT+P+R and keep all 4 down and listen for at least 2 start up chimes.Or you can wait for your Apple Keyboard!&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin&nbsp; &nbsp; :D" loading="lazy" data-shortname=":D" />&nbsp; Grin</blockquote>

[QUOTE="dtravis7, post: 1627277, member: 8287"] A 2007 iMac will run Lion or for that matter Yosemite just fine as I have one here! 2GB Ram though for Yosemite would be very lean. The very fact Yosemite installed is proof it will run. Yosemite will not even let you install on a non supported Mac. If the OP sees this before his keyboard arrives, to do a PRAM (parameter RAM BTW) using a Windows keyboard, Here are the keys. (As you know to do it on a Mac keyboard you hold Command+Option+P+R down all at the same time and keep them down till you hear 2-3 apple chimes.) On a Windows keyboard the LEFT Windows key is Command and the ALT key is OPTION. So you would press Windows+ALT+P+R and keep all 4 down and listen for at least 2 start up chimes. Or you can wait for your Apple Keyboard! :D Grin [/QUOTE]

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