Lenovo V530S running Sequoia - it boots, everything works!
I bought the "base" on Allegro (a Polish online marketplace): a Lenovo ThinkCentre V530S case complete with the power supply and motherboard.
I put the following parts into it:
- An i7-9700T — a low-power 9th-gen i7 that I picked up for PLN 150 / $40
- 32 GB of RAM — bought from a pawn shop back when prices were still low, for next to nothing
- A 512 GB WD NVMe SSD — PLN 150 / $40
- Fenvi T919 WiFi card — PLN 70 / $20
- A 12th-gen i7 cooler with a copper core, which I modified myself to fit on LGA1151 mounting holes, because Lenovo’s stock aluminium cooler was dra-ma-ti-cal-ly loud
I spent two days getting macOS Sequoia 15.7.9 running on it — and it worked! 🙂 After that, there was still quite a bit of tinkering required to get Wi-Fi and AirDrop working, but I eventually managed that too.
Today, I added a 3 TB HDD and a 4 GB RX 550 that I had to spoof as an RX 560.
I’m still waiting for an adapter from AliExpress that converts a standard internal 9-pin USB header to Lenovo’s proprietary 11-pin connector. In the meantime, I temporarily rigged the Wi-Fi card’s USB connection so I could route the cable out through the back of the case and plug it into an USB port on the back.
Basically everything that I can think of - works