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<blockquote data-quote="pigoo3" data-source="post: 1762869" data-attributes="member: 56379">It seems that you've tried a bunch of things so far...a lot of good stuff I would have tried as well.If you really want to determine if it's a &quot;software thing&quot; (some funky old files confusing things)...on a 2nd hard drive or a new partition on an existing hard drive...do a fresh install of the Mac OS (only the Mac OS and nothing else).&nbsp; Now boot into that new OS install...and see what happens. &nbsp;- If the issue disappears<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />...great.&nbsp; Then we know there's something on the original HD that's causing the issue.- If the problem remain's<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown&nbsp; &nbsp; :(" loading="lazy" data-shortname=":(" />...then it's either a hardware compatibility thing with this non-Mac video card...or maybe a driver thing (don't have the right driver for this Windows card). &nbsp;Of course remember that the problem could still be a &quot;software thing&quot;.&nbsp; The test above may eliminate the &quot;software thing&quot; possibility due to old files, wrong drivers, etc.&nbsp; But a remaining &quot;software thing&quot; could simply be that this specific Windows video card just doesn't work well with the Mac OS.HTH,- Nick</blockquote>

[QUOTE="pigoo3, post: 1762869, member: 56379"] It seems that you've tried a bunch of things so far...a lot of good stuff I would have tried as well. If you really want to determine if it's a "software thing" (some funky old files confusing things)...on a 2nd hard drive or a new partition on an existing hard drive...do a fresh install of the Mac OS (only the Mac OS and nothing else). Now boot into that new OS install...and see what happens. - If the issue disappears:)...great. Then we know there's something on the original HD that's causing the issue. - If the problem remain's:(...then it's either a hardware compatibility thing with this non-Mac video card...or maybe a driver thing (don't have the right driver for this Windows card). Of course remember that the problem could still be a "software thing". The test above may eliminate the "software thing" possibility due to old files, wrong drivers, etc. But a remaining "software thing" could simply be that this specific Windows video card just doesn't work well with the Mac OS. HTH, - Nick [/QUOTE]

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