Donw35 Posted September 21, 2022 Author Share Posted September 21, 2022 sorry guys, been out of country for a while, I will get to it.... 1 Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2793745 Share on other sites More sharing options...
bayard0 Posted October 2, 2022 Share Posted October 2, 2022 So the HP 800 G1 i setup for family member back in 2019 is looking for an update. I decided to download Monterey 12.6, put the installer on a USB then copied your EFI from 1st post into the EFI partition then tried to boot from the USB and the system isn't booting, after I select the USB to boot from it just shows a screen stating TRYING TO BOOT FROM USB and thats it. what am I doing wrong? Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2794359 Share on other sites More sharing options...
Peckamal Posted May 21, 2023 Share Posted May 21, 2023 Hi, Can anyone share a working EFDI for Monterey or Ventura? Thank you HP EliteDesk 600 G2 Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2804918 Share on other sites More sharing options...
prynhart Posted September 29, 2023 Share Posted September 29, 2023 Hi all Recently I've been experimenting with Monterey via HP_800_G1_075.zip. Although it works fine with a single monitor (connected via the onboard DisplayPort) as soon as I connect a second monitor (also via onboard DisplayPort), I get the following on the EFI Boot screen: The error text reads: OCC: Failed to set mode 2 (prev 1) with 1920x1200 resolution. Halting on Critical Error. I'm hoping that there might be some quick / easy fix for this ? For the last three years I've been running on HP_800_G1_OC_58.zip with Mojave with Dual DisplayPort monitors, so I'm pretty sure that the hardware should be able to do it under Monterey. Unfortunately I don't know enough about OC and customising the EFI. @Donw35: I can't thank you enough for your amazing efforts with supporting HP Elitedesk 800 G1. It's been my daily driver for 3 years - and preforms better than my Intel MacMini. With Many Thanks Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2811729 Share on other sites More sharing options...
robi62 Posted February 16 Share Posted February 16 (edited) hi I finally managed to get a working efi for Ventura on the hp 800 g1 usdt 4k res works you can try it and see how it goes cannot post efii as is bigger than 10mb... Edited February 16 by robi62 1 Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2816997 Share on other sites More sharing options...
protocold Posted June 5 Share Posted June 5 @robi62 where can we download your EFI? i would like to give it a try. Thanks! Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2820734 Share on other sites More sharing options...
robi62 Posted July 23 Share Posted July 23 On 6/5/2024 at 5:17 AM, protocold said: @robi62 where can we download your EFI? i would like to give it a try. Thanks! hi here https://filetransfer.io/data-package/T9sHNRds#link 1 Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2823164 Share on other sites More sharing options...
Felin Tan Posted December 2 Share Posted December 2 (edited) robi62, or anyone else here, where can I get a copy of your EFI each for Ventura and Sonama, please for hp 800 g1 ?? Edited December 2 by Felin Tan Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2828544 Share on other sites More sharing options...
eSaF Posted December 2 Share Posted December 2 @Felin Tan - Look here -https://github.com/MuhannadYT/HP-Elitedesk-800-G1-EFI - you may find what you're looking for. Good luck. Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2828545 Share on other sites More sharing options...
robi62 Posted December 5 Share Posted December 5 (edited) On 12/2/2024 at 8:41 PM, Felin Tan said: robi62, or anyone else here, where can I get a copy of your EFI each for Ventura and Sonama, please for hp 800 g1 ?? hi here is the efi I was using for mine sff model https://filetransfer.io/data-package/e4FMBhLN#link Edited December 5 by robi62 Link to comment https://www.insanelymac.com/forum/topic/323180-ventura-monterey-big-sur-catalina-mojave-high-sierra-on-hp-800-g1-usdtsff-and-tower-pcs/page/18/#findComment-2828616 Share on other sites More sharing options...
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