A possible concise summary is:
The speaker tries to turn an old Apple Xserve server into a gaming machine by upgrading its RAM, CPU and GPU. He encounters various challenges and bugs along the way, such as memory limitations, input lag, black screen and unsupported drivers. He also talks about the history and future of gaming on Mac OS and promotes a sponsor.
Here are some key facts extracted from the text:
1. The text is a transcript of a video where the speaker tries to game on an Apple Xserve, a server machine from 2009.
2. The speaker upgrades the Xserve with 64 GB of RAM and a Nvidia Titan X Black GPU, using a PCIe riser and an external power supply.
3. The speaker encounters various issues with the Mac OS 10.11, such as lack of driver support, black screen on Steam, input lag, and game crashes.
4. The speaker mentions that Steam will stop running on Mac OS 10.11 in 76 days, and that Apple has abandoned gaming on Intel-based Macs and Nvidia cards.
5. The speaker ends the video with a segue to the sponsor Grammarly Go, a generative AI assistant for writing.