I have a 500 GB SSD. At one point, it had 2 partitions–one for my regular macOS boot (430 GB), and one for developer previews (~70 GB). At some point, I deleted the developer preview partition, but the freed up space didn't flow back to the main partition. Also, I wasn't able to resize the Macintosh HD partition back to the full 500 GB. How do I get my 70 GB back on the Macintosh HD partition?
Here is the output from diskutil list
showing the total drive size and only 429.4 GB available:
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_KernelCoreDump 655.4 MB disk0s2
3: Apple_APFS Container disk1 429.4 GB disk0s3
/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +429.4 GB disk1
Physical Store disk0s3
1: APFS Volume Macintosh HD 396.5 GB disk1s1
2: APFS Volume Preboot 43.7 MB disk1s2
3: APFS Volume Recovery 509.8 MB disk1s3
4: APFS Volume VM 2.1 GB disk1s4
Best Answer
The following solution assumes some comfort with the command line - if you aren't comfortable with it, let me know and i will provide a GUI method.
Referring to your picture,
When the prompt returns, you should have the whole disk back. If not, please make a note of the result and publish it here.