rMBP SSD Missing Space

[JTToft]

That's because there IS no missing 18GB. Nothing is missing. It's simply calculated differently than you expect. All the space is there, whether it's being used for something or available for you to use, and regardless of what unit of measurement is employed, all the space is there.

- Alright. Then perhaps we have different definitions of the word "missing"...
When Apple advertises 768 GB and I only get 750 GB, I'd call the discrepancy of 18 GB missing GBs.

The advertised space on all other SSDs on the market match exactly what you get. Why doesn't Apple's?

 

[terraphantm]

- Alright. Then perhaps we have different definitions of the word "missing"...
When Apple advertises 768 GB and I only get 750 GB, I'd call the discrepancy of 18 GB missing GBs.

The advertised space on all other SSDs on the market match exactly what you get. Why doesn't Apple's?

He's incorrect anyway. No calculation accounts for the missing space.

 

[JTToft]

If all of the space was there, the drive should report its capacity as 512,000,000,000 bytes. It doesn't.

Let's say one had a cMBP, bought a 512GB SSD, installed it in the system, installed OSX, and then checked the space. It would report itself as 512GB. Not 500GB like the SSDs in BTO systems

- And just to corroborate that statement, here's a screenshot from Disk Utility on my MacBook Pro with a 256 GB Samsung 830 SSD installed:

 

[JTToft]

He's incorrect anyway. No calculation accounts for the missing space.

- I know.

 

[ericrwalker]

For fun, here's my capacity in Bytes (the whole drive, not my partition): 256.060.514.304 bytes.

256,058,056,704 bytes

 

[JTToft]

256,058,056,704 bytes

- In other words: the same within 2.5 MBs. That's a deviation of 0.00096 %.