If the MacBook Pro SSD has serious logical errors, Disk Utility cannot repair the disk. In the sidebar, select the storage device you want to erase, then click the Erase button. It’s been awhile since I sold an old Mac.
Fix 2: Reformat and reinstall to fix MacBook Pro SSD not mounted/booting. If you’re planning to sell a Mac that boots from an SSD, or you have an old Flash drive or SSD you want securely erase, this article has the details.
Step 4: Click First Aid on the top of the window and wait while it verifying and repairing errors. Use the Disk Utility application to erase the drive. Step 3: Select the unmounted MacBook Pro SSD from the left-hand panel. 5, INDMEM SSD (USB flash drive is not recommended because of easy data. You can get an external SSD (Samsung T5 500GB 89.99 from Amazon ) and format for a reasonable price to use with your Mac’s Time Machine. When you use a hard disk drive, Time Machine will take a while to back up your Mac. These cloning instructions are for an Aura X2 SSD in a Retina Late 2013 Macbook Pro through to the 2015 Macbook Pro.
4, A USB portable SSD/HDD 32GB or more, clear all data before use. The MacBook and MacBook Pros come with an SSD to store data and an OS. With the introduction of Retina screen on the 2012 Macbook Pro, Apple moved to a M.2 shaped SSD that was non standard.
2, An Apple computer (MacBook Air/ MacBook Pro/ iMac) that Mac OS works fine. If you feel lucky, you can try omitting this step. 1, Make sure the macOS has been upgraded to 10.13 or later before moving out original SSD. Occasionally, step 5 fails, if step 4 is skipped. Note: Normally you should not have to use the diskutil commands to erase the drive. Open a Terminal window and enter the following commands.
Startup your Mac and immediately hold down the option+ ⌘+ R key combination. I hope they will be as reliable as the USB-C mobile rotating disk drives I’ve been using for 3 years.This answer is more tailored to your question. My initial observation of these SanDisk SSDs, was amazement how small they are. Scroll to select, Convert to APFS to complete the formatting to APFS. This pops-up a drop-down menu where “Convert to APFS…” can be selected at bottom of menu. Then for Step 7’s 2d erase, right-click (or, option-click) on “Untitled” that’s the secondary (lower) drive in the hierarchy view. This is the correct selection for the 1st erase. When the SanDisk SSD is first mounted (drive viewed in the side pane of Disk Utility), Step 4 requires selection of top most (called “main” in the instructions) in the drive hierarchy (entitled: SanDisk Extrem…). Note: the link’s convert (to APFS) instructions are a bit dated, as they’re for macOS 10.13 High Sierra I’m using 10.14.x Mojave and my notes below reflect Disk Utility in Mojave.
The converting process, which can be viewed at the link in my initial post, is fairly straight forward but, I’ll clarify several steps. My MacBook Pro has Thunderbolt 3 ports so, I connected the SanDisk SSDs, using TB3 cables (.5m) with USB-C type connectors, for best transmission speed. …I’m prepping these two SSDs for macOS Catalina, which will require APFS for cloning (and, possibly Time Machine - if not, I’ll convert that SSD back to Mac OS Extended - Journaled). …And, I’ve also completed converting the formatting to macOS APFS. I’ve now purchased 2 x 2TB Extreme Portable SSD USB-C Gen-2 external drives.