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Apple Computing Products:
macOS - Operating System
Boot Choices - Mojave or Mountain Lion
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<blockquote data-quote="Rich M" data-source="post: 1878698" data-attributes="member: 407377"><p><strong><em>PROBLEM SOLVED!</em></strong></p><p></p><p>MacInWin, you pointed me in the right direction when you said that Mountain Lion does not know how to communicate with the Sapphire RX 580 video card, and you were correct. </p><p></p><p>Here's what I did...</p><ul> <li data-xf-list-type="ul">I installed the old ATI Radeon video card so I could boot into the old OS - 10.8.5 Mountain Lion.</li> <li data-xf-list-type="ul">I downloaded OS Sierra 10.12.6 from Apple.<br /> This is the last version that allows the old Final Cut 7 to run.</li> <li data-xf-list-type="ul">I upgraded the OS from Mountain Lion to Sierra.</li> <li data-xf-list-type="ul">I shut down the machine <strong><em>without</em></strong> making any change to the start up disc.<br /> I wanted the machine to boot back up into Sierra.</li> <li data-xf-list-type="ul">I removed the old ATI Radeon video card.</li> <li data-xf-list-type="ul">I installed the Sapphire RX 580 video card.</li> <li data-xf-list-type="ul">I restarted the machine.</li> <li data-xf-list-type="ul"><strong>IT WORKED!</strong> The dual monitors properly displayed the desktop.</li> <li data-xf-list-type="ul">I started FCP 7 and it ran fine.</li> <li data-xf-list-type="ul">I changed my start up disc to Mojave and rebooted.</li> <li data-xf-list-type="ul">All OK in Mojave and FCP X.</li> </ul><p>When running Sierra I had to install an updated driver for the AJA Kona LHi capture card and reset some of my preferences in FCP 7, but that's it. FCP 7 works fine in Sierra, and nothing has changed in my Mojave setup where I now work every day in FCP X. </p><p></p><p>My thanks to all of you who posted in this thread. This has been a major headache for several months. I'm glad we got it solved.</p></blockquote><p></p>
[QUOTE="Rich M, post: 1878698, member: 407377"] [B][I]PROBLEM SOLVED![/I][/B] MacInWin, you pointed me in the right direction when you said that Mountain Lion does not know how to communicate with the Sapphire RX 580 video card, and you were correct. Here's what I did... [LIST] [*]I installed the old ATI Radeon video card so I could boot into the old OS - 10.8.5 Mountain Lion. [*]I downloaded OS Sierra 10.12.6 from Apple. This is the last version that allows the old Final Cut 7 to run. [*]I upgraded the OS from Mountain Lion to Sierra. [*]I shut down the machine [B][I]without[/I][/B] making any change to the start up disc. I wanted the machine to boot back up into Sierra. [*]I removed the old ATI Radeon video card. [*]I installed the Sapphire RX 580 video card. [*]I restarted the machine. [*][B]IT WORKED![/B] The dual monitors properly displayed the desktop. [*]I started FCP 7 and it ran fine. [*]I changed my start up disc to Mojave and rebooted. [*]All OK in Mojave and FCP X. [/LIST] When running Sierra I had to install an updated driver for the AJA Kona LHi capture card and reset some of my preferences in FCP 7, but that's it. FCP 7 works fine in Sierra, and nothing has changed in my Mojave setup where I now work every day in FCP X. My thanks to all of you who posted in this thread. This has been a major headache for several months. I'm glad we got it solved. [/QUOTE]
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Apple Computing Products:
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Boot Choices - Mojave or Mountain Lion
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