sszeto - You might have to do a "controller" reset, per crucial support:
John : In a Mac, install the SSD, power on and press the Option key to enter the Startup Manager.
Leave it on the Startup Manager screen for around 30 minutes without using the Mac, then power off and disconnect the SSD altogether.
After 30 seconds, reconnect the SSD and repeat steps 1 and 2 again.
Power off, take out and reconnect the SSD and power back on.
After the above steps, the SSD should be detected in the Mac again. If not,
John : If not then fill out the following
John : We have a team specialized to troubleshoot SSD issues. To ensure that you get the detailed assistance you need, please contact our Technical Support department at 1-800-336-8896 (U.S. and Canada only) or at 208-363-5790. Our contact hours are Monday through Friday from 7 a.m. to 6 p.m. (Mountain Time). When you call, please have the following information available to assist with the troubleshooting process:
• Motherboard Make/Model:
• Motherboard BIOS Revision:
• SATA Speed: SATA 1 (1.0Gb/s), SATA 2 (3.0Gb/s), SATA 3 (6.0Gb/s):
• What color Header are you using for your SATA cable?
• What is SSD being used for? (O/S, Storage, Page File, etc.)
• Operating System:
• Have you tried swapping out SATA cables? Have you tried different color controller header?
• Are you using the latest revision of Firmware
• Describe the situation causing the issue (i.e.: software being used, is data corrupted, do you get a blue screen, etc.)