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  1. zackcentury

    The Dell OptiMac Big Sur/OpenCore Thread - For 7020/9020 Optiplex Desktops

    Quoting the above post because I have a related question. Working on getting OC/Big Sur on my Dell Precision T1700 MT. After making the EHCx and XHCI BIOS changes, my machine loses all USB functionality. It will boot a SATA SSD but none of my USB ports work after making the changes. To regain...
  2. zackcentury

    The 4K Dell OptiMac - 9020 MT - Core i7-4790 - Radeon RX 570 - LG 4K IPS Monitor

    SOLVED by my own search... :shifty: I'm working on a Dell Precision T1700, and just wanting to verify my BIOS changes. I suspect they will all be the same as what's written in the guide. I am able to find all vars except '0x2'. Can you give me a hint as to what this var is exactly, or how you...
  3. zackcentury

    The 4K Dell OptiMac - 9020 MT - Core i7-4790 - Radeon RX 570 - LG 4K IPS Monitor

    Success, Catalina on my 7020 SFF i5 after a smooth install, less than an hour. I got very lucky on an auction site and got this SFF with Win10, 1tb, 16gb ram for less than $100. After testing some various cards (R5 240, Gt 730, GT 635) I settled on the GT 635 because the performance was better...
  4. zackcentury

    "best" graphics card for Catalina with special requirements

    RX 460 and 560 are great choices, but both have become harder to find. I'm running the HP OEM 910486-002 "Han Solo" RX 460 and it works just like any other AMD card. 2gb only, and the heatsink is small, but if you don't demand much it's a fine choice. I got mine for $60 about a year ago, you...
  5. zackcentury

    The 4K Dell OptiMac - 9020 MT - Core i7-4790 - Radeon RX 570 - LG 4K IPS Monitor

    @trs96 Thank you for keeping this guide up to date. I've been able to use your guides since the HP 6200 to keep several stable builds going. Favorites are USFF i7 7010, which runs great after sorting out ME Lockout issues; an HP Z230 i7-4770, 16GB, RX 460, install is similar; and embarking on a...
  6. zackcentury

    [Guide] Install Catalina on the Dell Optiplex 7010 and 9010 Desktop PC

    Hi, thanks very much for the guide. Just completed an install on my USFF 7010 with the 3770s and all seems well. Is it still recommended to generate custom SSDT with this guide? I've done it with your previous guides on a couple builds, but I wonder if the 3770s is covered by your 3770 ssdt.aml...
  7. zackcentury

    [Success] GT640 10.10.5 Yosemite boot/scale/flicker solved

    Hi I just wanted to report my steps to success with a Geforce Gt 640 using Chimera and Yosemite 10.10.5. In my search to get this card working I found a lot of people just gave up and moved to a GTX 750 or something else that works OOB (not a bad thing) but I chose the GT 640 because the EVGA...
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