How to use

1>Make sure to install the High Sierra on your old drive, so that a newer firmware is installed that can handle NVME.

2>For your old driver, please do a full backup via Time Machine.

3>Create a High Sierra Installer on a bootable USB stick.

4>Open the MacBcook and disconnect the battery while switching out the drive and make sure both adapter and new SSD sit snug

5>Reconnect the battery before closing the shell.

6>Insert the Installer USB stick from step 2, and press the option key while the machine starts.

7>Finally, once it's up you can now go to the disk utils to format and install the MAC OS.

Some advice

1>You are kindly reminded that macOS failed to resume hibernating with some NVME SSDs of some brands. Have to turn off the laptop all the time instead of closing the lid and go.

2>Please insert our adapter fully into the SSD slot and you must prepare a bootable USB disk (see the third point) with High Sierra to format M.2 SSD first, it can't support recovery from the internet.

3> Many customers can use it, so we suggest you try it again if your MAC can't detect NVME SSD.