![Trying to use my 2011 imac running high sierra as an external display for a OC via HDMI to miniDisplay port. Unfortunately I tried to book them up and using the windows ( Trying to use my 2011 imac running high sierra as an external display for a OC via HDMI to miniDisplay port. Unfortunately I tried to book them up and using the windows (](https://preview.redd.it/trying-to-use-my-2011-imac-running-high-sierra-as-an-v0-x05i18l5ecua1.jpg?width=640&crop=smart&auto=webp&s=2f721aa057c6760c92daef0c923f856c9f2576a0)
Trying to use my 2011 imac running high sierra as an external display for a OC via HDMI to miniDisplay port. Unfortunately I tried to book them up and using the windows (
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![On my MacBook Pro Late 2011 with a Thunderbolt adapter, if I use either HDMI or USB only, my Mac can't detect the external monitor, but if both are used, then it's On my MacBook Pro Late 2011 with a Thunderbolt adapter, if I use either HDMI or USB only, my Mac can't detect the external monitor, but if both are used, then it's](https://qph.cf2.quoracdn.net/main-qimg-2687ec96ce5ffff22c4bd0f967a16ba1.webp)
On my MacBook Pro Late 2011 with a Thunderbolt adapter, if I use either HDMI or USB only, my Mac can't detect the external monitor, but if both are used, then it's
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