This guide uses Mac OS X El Capitan Version 10.11.5. Procedure may be different with other OS versions.
1. Connect your SanDisk® SSD to your Apple Mac system via USB adaptor, the Mac OS will pop up a message: 'The disk you inserted was not readable by this computer', please select Initialize
2. Disk Utility will pop up, if not, open Disk Utility and you shall see the SSD listed under External
3. Select the SSD and then select Erase button on top of disk utility
Warning: date: It is not safe to rely on the system's timezone settings.You are.required. to use the date.timezone setting or the datedefaulttimezoneset function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. Apr 15, 2018 Before reinstalling, format the SSD using the disk utility (as “ Mac OS Extendet Journaled “). After that OS X can be installed on the new SSD. Just follow the instructions on the screen. In the last step, the data and settings are now restored from the TimeMachine backup. Sep 06, 2019 Use a Mac OS X installation Disc. If you’re unable to use Internet Recovery Mode or create a bootable USB installer, you can still use a Mac OS X installation disc. These discs are available for OS X Snow Leopard, OS X Lion, and OS X Mountain Lion. If your Mac is from 2012 or earlier, there was an installation disc in the original box.
4. Input your desired name of the partition, if you plan to install Mac OS onto the partition,choose OS X Extended(Journaled) as format. Otherwise you can choose either OS X Extended or ExFAT as format. Please choose GUID Partition Map as Scheme. After you click Erase, the erase will start and the partition you created will appear under the drive on left side of Disk Utility.
5. You can also create multiple partitions in one SSD. In Disk Utility, select the SSD(not the partition under), then select Partition button on top of Disk Utility.
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6. Input new partition name, and use '+' and '-' button on the left to determine the size of the partition. Then select ' Apply'