Cyanogenmod on HTC Desire

It’s complicated.

I used

• a previously rooted HTC Desire with a pretty old version of twrp, and
• a CM11 M12 ROM for HTC Desire: http://forum.xda-developers.com/showthread.php?t=2549776

Steps:

• Wipe
• Format SD Card with ext4 (Recommend 512MB swap and leaving a couple GB to system partition, so with an 8GB SD-Card, set Ext to 2GB)
• Flash CM ROM
• DO NOT flash gapps
• Reboot
• Let the ROM boot (This can take 5 to 15 minutes)
• After ROM is booted let it sit for 5 minutes (yes really)
• Skip initial setup
• Open Terminal Emulator
• Run su and confirm Superuser permissions
• Run as2d install
• answer y/n/y
• Reboot into ROM, let it optimize apps, let it sit for 5 minutes again
• Reboot into recovery
• Flash gapps
• Wipe cache from Flash menu after flashing
• Reboot

You should now have a working CM11 HTC Desire.