5 ms·

oh definitely remove the hard disk. even if you delete files, pros can recover it.

graderjs 4y ago
yes, what about using something like 'srm' (supposed to be a secure rm)? issue is MacBook air cannot remove hardrive (cannot even open without voiding warranty i think).
- InCityDreams 4y ago
  >cannot even open without voiding warranty i think Wasn't the whole 'you cant't open it/ warranty issue' thrown out somewhere (hard drives, for example)? EU or US? /sorry, on mobile. Limited research for a few days.
- runlevel1 4y ago
  The `srm` that used to ship with MacOS doesn't work with SSDs. It worked by overwriting, renaming, and truncating the file before unlinking it. On rotational HDs, the overwrites clobber the data in the same physical location on disk. On SSDs, the overwrites will typically appear in a new location on disk due to wear-leveling and block-sparing. Your best bet is to turn on FileVault, wait for it to finish encrypting the drive, then wipe the whole disk in Recovery Mode.
dangus 4y ago
This is generally going to be outdated advice for computers and phones that have SSDs leveraging built-in full disk encryption and cryptographic erasure. Since OP brought up Apple products, that will include anyone using FileVault, and it even includes people not turning on FileVault on all Macs leveraging the T2 chip or Apple Silicon – Apple is forcing full-disk encryption even if you're not enabling FileVault. For iOS devices this automatic full-disk encryption has been happening for many years now, implemented much earlier than Intel Mac systems gained the capability. I think the iPhone 4 was the first iPhone to get full-disk encryption, which on iOS has always been on by default and cannot be disabled. If your Mac system is on this list or newer then it's already protecting your storage: https://en.wikipedia.org/wiki/Apple_T2#Products_that_include_the_Apple_T2 https://en.wikipedia.org/wiki/Apple_T2#Products_that_include...

yes, what about using something like 'srm' (supposed to be a secure rm)? issue is MacBook air cannot remove hardrive (cannot even open without voiding warranty i think).

InCityDreams 4y ago
>cannot even open without voiding warranty i think Wasn't the whole 'you cant't open it/ warranty issue' thrown out somewhere (hard drives, for example)? EU or US? /sorry, on mobile. Limited research for a few days.
runlevel1 4y ago
The `srm` that used to ship with MacOS doesn't work with SSDs. It worked by overwriting, renaming, and truncating the file before unlinking it. On rotational HDs, the overwrites clobber the data in the same physical location on disk. On SSDs, the overwrites will typically appear in a new location on disk due to wear-leveling and block-sparing. Your best bet is to turn on FileVault, wait for it to finish encrypting the drive, then wipe the whole disk in Recovery Mode.

dangus 4y ago

This is generally going to be outdated advice for computers and phones that have SSDs leveraging built-in full disk encryption and cryptographic erasure. Since OP brought up Apple products, that will include anyone using FileVault, and it even includes people not turning on FileVault on all Macs leveraging the T2 chip or Apple Silicon – Apple is forcing full-disk encryption even if you're not enabling FileVault. For iOS devices this automatic full-disk encryption has been happening for many years now, implemented much earlier than Intel Mac systems gained the capability. I think the iPhone 4 was the first iPhone to get full-disk encryption, which on iOS has always been on by default and cannot be disabled. If your Mac system is on this list or newer then it's already protecting your storage: https://en.wikipedia.org/wiki/Apple_T2#Products_that_include_the_Apple_T2 https://en.wikipedia.org/wiki/Apple_T2#Products_that_include...