SSD In iMac G4 not recognized
Make sure your SSD is working by connecting it to different computer through SATA or SATA to USB adapter.
Make sure your PATA adapter is working by connecting it to different computer. Also try different drive with it.
Try to buy another adapter with another chip, prefer unidirectional one.


There a whole lot of incompatibilities with them
This one for example is working fine in my FW IDE enclosure with TI chip and not in the FW enclosure with some different chip. Go figure!