macOS 11.0 beta 1 (Big Sur) on unsupported Macs

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Compatibility status
Note: this patcher only supports computers that are in the table below. Do not ask me to add support for other models.

Model Identifier
Human-Readable Name
Status
MacBookAir5,1
MacBook Air (11-inch, Mid 2012)
Everything except Wi-Fi works
MacBookAir5,2
MacBook Air (13-inch, Mid 2012)
Everything except Wi-Fi works
MacBookPro9,1
MacBook Pro (15-inch, Mid 2012)
Everything except Wi-Fi works
MacBookPro9,2
MacBook Pro (13-inch, Mid 2012)
Everything except Wi-Fi works
MacBookPro10,1
MacBook Pro (Retina, 15-inch, Mid 2012)
Everything except Wi-Fi works
MacBookPro10,2
MacBook Pro (Retina, 13-inch, Early 2013)
Everything except Wi-Fi works
Macmini6,1
Mac mini (Late 2012)
Everything except Wi-Fi works
Macmini6,2
Mac mini (Late 2012) quad-core
Everything except Wi-Fi works
iMac13,1
iMac (21.5-inch, Late 2012)
Everything except Wi-Fi works
iMac13,2
iMac (27-inch, Late 2012)
Everything except Wi-Fi works
iMac14,1
iMac (21.5-inch, Late 2013) integrated GPU
Everything works
iMac14,2
iMac (27-inch, Late 2013)
Everything works
iMac14,3
iMac (21.5-inch, Late 2013) discrete GPU
Everything works
MacPro5,1
Mac Pro (Mid 2010/Mid 2012)
WiFi does not work; sleep issues

Instructions to install

You'll need:

Steps

  1. Open and install the 11.0b1 installer package normally onto your computer (this won't actually install the OS). You can delete it if you need the space back.
  2. Plug in the USB flash drive.
  3. Using Disk Utility, erase the flash drive and format it as "macOS Extended (Journaled)" with scheme "GUID Partition Map". If you can't see the scheme option, click View -> Show All Devices and select the whole disk (not the partition), then click Erase again.
  4. Open Terminal.
  5. Type sudo /Applications/Install\ macOS\ Beta.app/Contents/Resources/createinstallmedia --volume, a space, and then drag in the flash drive from the desktop and press Enter.
  6. Type your administrator password (you won't see any dots) and press Enter.
  7. Follow the instructions, typing Y when asked.
  8. Extract "tool.zip" you downloaded earlier.
  9. Type xattr -c, a space, and then drag patch_installer.sh into terminal and press Enter.
  10. Drag patch_installer.sh into terminal again, then drag in the newly created installer partition, then press Enter.
  11. Eject your flash drive and boot it on the unsupported Mac (by holding the option key at boot and selecting it)
  12. Install macOS normally
  13. You're done!

Special thanks to ASentientBot for the method of removing the installer compatibility check ("hax.dylib").

Unresolved Questions