Optiplex 5050

look in Thread/34172-

Probleme-mit-Installation-von-High-Sierra-auf-Dell-Optiplex-5050

may it help you

*Edit*

Probleme mit Installation von High Sierra auf Dell Optiplex 5050

Hi @Keysel and welcome to the forum...

Rename the EFI folder on your hidden EFI partition to "EFI-old" and copy the contents of the attached ZIP-file as a substitute...
Do you use the DELL with an AMD graphics card?

Zitat von Keysel

OPIPLEX 5050

Intel Core i7 7700
Dell Optiplex 5050
8gb Ram
1tb HDD Western Digital

my computer freezes as soon as it starts running Hakingtosh Sierra

like This

(sxAptioFixDrv: Starting overrides for \System\Library|CoreServices|boot.efi) Using reloc block: yes, hibernate wake: no ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

PLEASE HELP

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Were you able to make it work?