If you need, press F8 for advanced Chameleon options, for example:
-v (verbose boot)
-x (safe)
-s (single user)
GraphicsEnabler=yes (enable graphics card drivers)
USBBusFix=yes (fix problems with USB devices)
npci=0x2000 (use if boot stops at "PCI configuration begin")

If boot hangs at "PCI configuration begin" even if you type flag npci=0x2000 viewtopic.php?f=17&p=14540#p14520

硬盘分区：

You need at least one free partition, use Disk Utility (in the Utilities menu) to erase it as Mac Os Extended (Journaled).

If you want to install Chameleon (the boot loader) in this partition and you use MBR (not GUID, like if you already have Windows in the HD), it must be a primary (not extended/logical) partition.

Wait for the installation to finish and restart. If the progress bar stops being updated, just move the mouse. Depending on the video card, using GraphicsEnabler=yes can fix this.