The CyanogenMod team have extended their support to the HTC One Mini (M4) by developing their Android 4.4.2 based CM 11 ROM for it. It all started with the initial release of a test build a couple of days back with nightly builds now also available.
The HTC One Mini was launched in July last year after the tremendous success of its bigger brother, the One (M7). The One Mini had a 4.3-inch screen, 1.4 GHz dual-core Snapdragon 400 processor, 1 GB RAM, 16 GB internal storage, 4 MP UltraPixel camera and 1.6 MP front-facing camera. It originally ran on Android 4.2.2. Now follow the below steps to install the official CyanogenMod 11 ROM, running on Android 4.4.2, on it.