Hey everyone,

I’m trying to get macOS Sequoia (15.6) installed on my late 2012 13” MacBook Pro (MacBookPro9,2) using OCLP 2.4.0, but I keep running into frustrating networking and install verification issues. Here’s everything I’ve tried so far:

✅ What I’ve Done:

• Installed the latest OpenCore Legacy Patcher (2.4.0)
• Created a bootable USB for Sequoia 15.6
• Installed macOS and ran post-root patching

It booted — but was super slow.

Turns out the machine still had:

• A stock 5400RPM HDD
• Only 4GB RAM

So I upgraded to:

• 512GB SSD (2.5")
• 16GB RAM

🧱 Second Attempt:

I booted the same USB and tried to install again — but at the very end, it fails and says:

⚠️ Network Problems:

• Wi-Fi toggle shows "No Internet Connection..." 📷 (see attached screenshot)
• It lists a blank network with a ✅ checkmark but shows no actual Wi-Fi networks and I can’t “Join Other Network…” — nothing happens.
• I plugged in Ethernet directly to my router. This gets through the full install, but then:

• Eventually, I get another pop-up saying:

So no matter what I try — Wi-Fi and Ethernet both fail at the very end.

🖥️ Catalina Still Works

I booted into Internet Recovery (Cmd + Opt + R) and reinstalled macOS Catalina, which works perfectly — fast and stable. So I know the hardware and networking can work.

📸 Screenshots of Actual Errors

Attached screenshots show:

1. Wi-Fi menu showing “No Internet Connection” + blank network
2. The macOS Update Assistant getting stuck at “Updating…”
3. Startup disk selection screen
4. The error popup: “An error occurred preparing the software update.”

❓ My Main Questions:

• Could running post-root patching on the first install have messed up a kext or Wi-Fi driver?
• Is there a known issue with network stack or update assistant in Sequoia installs on older machines?
• Is there a manual way to bypass the verification check at the end of install?

Any help would be amazing — I just want to get Sequoia fully installed and working!

Thanks in advance 🙏

https://preview.redd.it/xjwinmew4ghf1.jpg?width=3024&format=pjpg&auto=webp&s=8793b8fde0faf4a07dfd699d3a9d5919ea73c238

https://preview.redd.it/2d6zqnew4ghf1.jpg?width=3024&format=pjpg&auto=webp&s=d42433ccae1c2df2ee2e4985289e7971a2e473dc

https://preview.redd.it/leme9new4ghf1.jpg?width=3024&format=pjpg&auto=webp&s=20bd31417b663249f33ab6565f2f7d29bc95f96d

https://preview.redd.it/v61ghnew4ghf1.jpg?width=3024&format=pjpg&auto=webp&s=c0e1914a9b454975494a1788531ef1efcf143820