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Clean Install MBP 2019 16"

randomgeeza

randomgeeza

macrumors 6502a
Original poster
Aug 12, 2014
656
550
United Kingdom
I am trying to clean install on a MBP 2019 16". I have turned off the necessary settings in Startup Uiltiy in the Recovery Console. And have thus far, I HAVE managed to get into the USB Booter's Recovery Console, although that too took a learning curve, coming from a T1 to a T2 chip machine.

However, once wiping the disc; creating a new disc, settings up the particulars etc. I click on Reinstall macOS and it defaults to the Internet version of the installer. It does not want to take the installer on the USB. To troubleshoot, I have created another installer pen; same results. I have also tried the various key combinations to get into the varying recovery consoles. All of which default to the internet installer...

Is this something new with the T2 chip, or have I missed a setting?

Any help appreciated with this one. Thanks.

Oh and there is definitely coil whine on my machine... Is this something to be concerned about?
 
I don't believe Apple has posted an installer compatible with the 16" machine yet. So it's got to go to the internet for installation. After macOS 15.2 is released, you'll be able to install from an external source.
 
Did you completely wipe you disk? In that case I guess you also wiped the recovery partition?

On my computer "diskutil list" shows the information below. When I did a clean install of Catalina on an older MBP I only erased the "Macintosh HD" and "Macintosh HD - Data" partitions and left the rest intact. In that case I could install Catalina from a USB.

If you completely nuked the HDD I believe you can only do an internet recovery. But as your machine is new that should make no difference to you, apart from the fact that it is a very long download.

mats@Mats-MBP-2 Profiles % diskutil list
/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *2.0 TB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_APFS Container disk1 2.0 TB disk0s2

/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +2.0 TB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD 10.9 GB disk1s1
2: APFS Volume Macintosh HD - Data 980.7 GB disk1s2
3: APFS Volume Preboot 82.0 MB disk1s3
4: APFS Volume Recovery 528.5 MB disk1s4
5: APFS Volume VM 1.1 GB disk1s5
 
chabig said:
I don't believe Apple has posted an installer compatible with the 16" machine yet. So it's got to go to the internet for installation. After macOS 15.2 is released, you'll be able to install from an external source.
Click to expand...

That makes sense...
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matram said:
Did you completely wipe you disk? In that case I guess you also wiped the recovery partition?

On my computer "diskutil list" shows the information below. When I did a clean install of Catalina on an older MBP I only erased the "Macintosh HD" and "Macintosh HD - Data" partitions and left the rest intact. In that case I could install Catalina from a USB.

If you completely nuked the HDD I believe you can only do an internet recovery. But as your machine is new that should make no difference to you, apart from the fact that it is a very long download.

mats@Mats-MBP-2 Profiles % diskutil list
/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *2.0 TB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_APFS Container disk1 2.0 TB disk0s2

/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +2.0 TB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD 10.9 GB disk1s1
2: APFS Volume Macintosh HD - Data 980.7 GB disk1s2
3: APFS Volume Preboot 82.0 MB disk1s3
4: APFS Volume Recovery 528.5 MB disk1s4
5: APFS Volume VM 1.1 GB disk1s5
Click to expand...

I just followed the normal procedure to clean install, which in my case means; yes... nuking the SSD. I have worked around it by using the internet install procedure. My concerns were for further down the line, and potential clean installs, I don't (didn't) want to have to fall back to the OS that came with the machine... Either way it's sorted for now and I'll wait on for 10.15.2. :)
 
you can't use USB installers on T2 chips, unless you already have a version of macOS installed and you boot into recovery mode ( Command R ) and adjust the secure boot settings.
 
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ThirteenXIII said:
you can't use USB installers on T2 chips, unless you already have a version of macOS installed and you boot into recovery mode ( Command R ) and adjust the secure boot settings.
Click to expand...
Yes you can, don't spread FUD when you have no idea what you're talking about. I am a n00b to Mac and did it easily.

Basically you need to turn off secure boot completely BEFORE you format the drive and also enable booting from external USB devices.

After doing that and rebooting, you can delete the Macintosh HD and Macintosh HD - Data Partition then shut down the computer, then power it on while holding the Option key, that will give you the option to boot from the USB Flash disk which contains either Catalina or Mojave and it installs just fine, takes no longer than 16 minutes for a full install prodived you have a fast USB Flash Drive.
 
Super Spartan said:
Yes you can, don't spread FUD when you have no idea what you're talking about. I am a n00b to Mac and did it easily.

Basically you need to turn off secure boot completely BEFORE you format the drive and also enable booting from external USB devices.

After doing that and rebooting, you can delete the Macintosh HD and Macintosh HD - Data Partition then shut down the computer, then power it on while holding the Option key, that will give you the option to boot from the USB Flash disk which contains either Catalina or Mojave and it installs just fine, takes no longer than 16 minutes for a full install prodived you have a fast USB Flash Drive.
Click to expand...


LOL, how is any of what I said FUD and different then what you ranted on? You CAN use USB drives ONLY if you adjust the secure boot settings. If you dont, it won't work.
 
ThirteenXIII said:
LOL, how is any of what I said FUD and different then what you ranted on? You CAN use USB drives ONLY if you adjust the secure boot settings. If you dont, it won't work.
Click to expand...
My bad, I was thinking you meant you can't install macOS from a USB Drive. Period, now I saw the part where it says "if you had a previous macOs installed"
 
It’s pretty simple. Hold down Command+R to boot into recovery mode. Open disk utility. Erase the drive. Now you can do a clean install.
 
And that is exactly what I have been doing. But when you get to the point of installing offa the USB... the installer comes from the internet... regardless of how you got there... I suspect Chabig’s suggestion is the most accurate. And 10.15.2 will hopefully prove it right.
 
randomgeeza said:
And that is exactly what I have been doing. But when you get to the point of installing offa the USB... the installer comes from the internet... regardless of how you got there... I suspect Chabig’s suggestion is the most accurate. And 10.15.2 will hopefully prove it right.
Click to expand...

I guess my question would be why are you trying to install off the USB? Is it because it would take too long to download?
 
It’s how I’ve always done it. I always have a USB installer of the latest release OS to hand for emergency fixer installs or for clean installs... I travel a lot and you never know if or when.
 
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