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Apple Computing Products:
macOS - Operating System
Summary of Issues when upgrading to Mojave
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<blockquote data-quote="krs" data-source="post: 1850881" data-attributes="member: 67742"><p>The problem is with an <strong>unpowered</strong> hub, ie feed-through USB power only.</p><p>I would understand this if that configuration wasn't working on El Capitan either, but on El Capitan with the burner connected to the <strong>unpowered</strong> hub works fine.</p><p>I just did some measurements with the burner and Mojave (first one on unpowered hub, second one connected to powered hub</p><p>Burner idle...4.96 volts, 50ma; 5.05 volts, 50ma</p><p>Burner active (CD only)...4.77 volts, 340ma; 4.79 volts, 350ma</p><p></p><p>On the burner I can understand why Apple blocks operation via an unpowered hub since the burner would require even more current to burn a CD or DVD and without being able to draw enough current could produce a coaster</p><p></p><p>However, for the keyboard/mouse, that shouldn't be an issue since their current requirements are much less and moving the mouse or hitting a key only increases current draw by a few milliamps.</p><p></p><p>Now I'm wondering if I can use a non-powered USB 3.0 hub with Mojave at all</p></blockquote><p></p>
[QUOTE="krs, post: 1850881, member: 67742"] The problem is with an [B]unpowered[/B] hub, ie feed-through USB power only. I would understand this if that configuration wasn't working on El Capitan either, but on El Capitan with the burner connected to the [B]unpowered[/B] hub works fine. I just did some measurements with the burner and Mojave (first one on unpowered hub, second one connected to powered hub Burner idle...4.96 volts, 50ma; 5.05 volts, 50ma Burner active (CD only)...4.77 volts, 340ma; 4.79 volts, 350ma On the burner I can understand why Apple blocks operation via an unpowered hub since the burner would require even more current to burn a CD or DVD and without being able to draw enough current could produce a coaster However, for the keyboard/mouse, that shouldn't be an issue since their current requirements are much less and moving the mouse or hitting a key only increases current draw by a few milliamps. Now I'm wondering if I can use a non-powered USB 3.0 hub with Mojave at all [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Summary of Issues when upgrading to Mojave
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