Contribution d'origine par : Alf ,
SOLVED : SSD SATA III working in Optical Drive now. Followed Erick McWayne solution above and it worked for me. I have a MacBook Pro (15-inch, Early 2011) - 2.2 GHz Intel Core i7. I have a EVO 850 SSD as main drive and a 500 GB HDD in "Optical Drive", But it was taking too much battery/ too much noise. I put a new Samsung 860 EVO 500GB SATA III SSD in optical drive. For some reason it was not working. After reading the post above, I realized that my caddy is not SATA III compatible. So I clicked on the link provided https://www.amazon.com/gp/product/B004FM4UGE/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1&tag=ifixitam-20 It looked exactly like my previous caddy but something inside, a chip or something is new. Make sure seller is "HIGHFINE". NOTE : After installing new Caddy in optical drive with SSD Sata III, I started computer and was able to see SSD in DISK UTILITY. I initialized/ formatted it. BUT drive was showing in some weird small size. I restarted Laptop and it came on FINE.