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eksu

macrumors 6502
Aug 3, 2017
329
151
It was my understanding that Target Disk Mode only worked for the first beta and is actively blocked now.

Is this not the case?
 

startergo

macrumors 603
Sep 20, 2018
5,022
2,283
It was my understanding that Target Disk Mode only worked for the first beta and is actively blocked now.

Is this not the case?
It does not let me proceed with the install untill all external drives are removed. Target disk appears as external to the system
 

eksu

macrumors 6502
Aug 3, 2017
329
151
It does not let me proceed with the install untill all external drives are removed. Target disk appears as external to the system
I’ve been using an external disk to install for developer betas 1-4, I’ll check to see if it still works my way or not.
 
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dustwashere

macrumors member
May 27, 2019
59
6
Russia
installed Catalina (19A526h) with the help of dosdude utility http://dosdude1.com/catalina/
on the NVME blade ssd.
An important nuance -
1.for installation, you need to disable SIP, so you need a video card with a boot screen
2.during installation (after reboot), I don’t have another hard drive with the operating system in the MacPro and the computer did not boot (the screen with the “stop” symbol, I installed the Catalina with the “original” video card). why so - I can’t say, I don’t know. if there is another disk with the system, it boots, that is, the second disk with the operating system is needed only once, for the first boot. in the future, after the "primary" setup of Catalina, the system was already loaded without a second disk with a different operating system(Mojave)
 
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JedNZ

macrumors 6502a
Dec 6, 2015
647
247
Deep South
1.for installation, you need to disable SIP, so you need a video card with a boot screen

Why do you need to remove your Metal capable GPU? You don’t need boot screens to boot into RecoveryHD. I can boot into RecoveryHD with my R9 380X and my RX590, which are both Metal GPUs, and then disable SIP.
 
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zozomester

macrumors 6502
Apr 26, 2017
372
267
Hungary
I tried the Catalina Patcher from Dosdude. Working perfectly.
Thanks Dosdude!
 

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dustwashere

macrumors member
May 27, 2019
59
6
Russia
Why do you need to remove your Metal capable GPU? You don’t need boot screens to boot into RecoveryHD. I can boot into RecoveryHD with my R9 380X and my RX590, which are both Metal GPUs, and then disable SIP.
I could not boot while hold cmd+R( RX580)
 
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dustwashere

macrumors member
May 27, 2019
59
6
Russia
Maybe I am missing something. But I always use command + R to enter recovery mode in my Mac Pro 5,1


Check tomorrow again, but with my rx 580 and bluetooth keyboard, I'm not being recaptured in recovery. I ve always bet the original video card

UPD cmd+R
Of course
Т9
 

eksu

macrumors 6502
Aug 3, 2017
329
151
I can start installing MacOS Catalina onto an external drive, but when I boot onto the drive to continue, I get the stop symbol.

I am going to take this drive as is and install it as the only drive on my cMP with a EFI Bootscreen card and see if it progresses internally.

I wonder what changed, this worked great from Betas 1-4.
 
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eksu

macrumors 6502
Aug 3, 2017
329
151
Ok I moved the external drive into my cMP and got a screen that said
macOS could not be installed on your computer.

ERROR_F27C85B346​
 

dustwashere

macrumors member
May 27, 2019
59
6
Russia
Why do you need to remove your Metal capable GPU? You don’t need boot screens to boot into RecoveryHD. I can boot into RecoveryHD with my R9 380X and my RX590, which are both Metal GPUs, and then disable SIP.
please show how you go into the recovery HD with a metal GPU
now checked. I hold comd+R - there is nobootscreen, after 40 seconds the system screen
original bluetooth keyboard Apple and not original with a wire
 

Monotremata

macrumors 6502
Apr 11, 2019
370
217
Fontana, CA
please show how you go into the recovery HD with a metal GPU
now checked. I hold comd+R - there is nobootscreen, after 40 seconds the system screen
original bluetooth keyboard Apple and not original with a wire

Did you format your drive and weren't paying attention and wiped out the Recovery partition? Recovery mode works perfectly fine here without a boot screen. Just like every one else, hold CMD+R for a bit, then it boots into Recovery as it always has.
 

dustwashere

macrumors member
May 27, 2019
59
6
Russia
Did you format your drive and weren't paying attention and wiped out the Recovery partition? Recovery mode works perfectly fine here without a boot screen. Just like every one else, hold CMD+R for a bit, then it boots into Recovery as it always has.
no, it is not. I hold command and R and the user window loads
 

dustwashere

macrumors member
May 27, 2019
59
6
Russia
Use a wired keyboard, BT keyboards sometimes take too much time to be ready and don't work for keyboard boot shortcuts.
you're right. with windows keyboard with wire - everything is ok
Apparently, I pressed the wrong keys on the Windows keyboard
 

m11rphy

macrumors 6502a
Dec 26, 2009
642
372
Hi guys I just want to confirm the steps here if I may

1. remove my SSD from the Mac Pro and connect to my iMac via USB?
2. Install macOS Catalina on the SSD (is this the full install process? I saw someone say they half installed it?)
3. Put the SSD back into the Mac Pro
4. Boot the Mac Pro into recovery mode
5. Enter terminal and type: nvram boot-args="-no_compat_check"
6. Reboot the Mac Pro

Have I missed anything?
 

tsialex

Contributor
Original poster
Jun 13, 2016
13,455
13,602
Hi guys I just want to confirm the steps here if I may

1. remove my SSD from the Mac Pro and connect to my iMac via USB?
2. Install macOS Catalina on the SSD (is this the full install process? I saw someone say they half installed it?)
3. Put the SSD back into the Mac Pro
4. Boot the Mac Pro into recovery mode
5. Enter terminal and type: nvram boot-args="-no_compat_check"
6. Reboot the Mac Pro

Have I missed anything?
Boot args have to be set before installing the Catalina drive.
 

m11rphy

macrumors 6502a
Dec 26, 2009
642
372
Boot args have to be set before installing the Catalina drive.
So like this

1. remove my SSD from the Mac Pro and connect to my iMac via USB?
2. Install macOS Catalina on the SSD
3. Boot the Mac Pro into recovery mode
4. Enter terminal and type: nvram boot-args="-no_compat_check"
5. Shutdown Mac Pro
6. Put the SSD back into the Mac Pro
7. Reboot the Mac Pro

With regards to installing macOS Catalina on the SSD is this just a normal install all the way to having the iMac boot to the desktop from the SSD?
 

tsialex

Contributor
Original poster
Jun 13, 2016
13,455
13,602
So like this

1. remove my SSD from the Mac Pro and connect to my iMac via USB?
2. Install macOS Catalina on the SSD
3. Boot the Mac Pro into recovery mode
4. Enter terminal and type: nvram boot-args="-no_compat_check"
5. Shutdown Mac Pro
6. Put the SSD back into the Mac Pro
7. Reboot the Mac Pro

With regards to installing macOS Catalina on the SSD is this just a normal install all the way to having the iMac boot to the desktop from the SSD?
No. Boot-args need to be set on the Mac Pro, not the iMac.
 

m11rphy

macrumors 6502a
Dec 26, 2009
642
372
No. Boot-args need to be set on the Mac Pro, not the iMac.
No I understand that part im talking about installing macOS Catalina on the SSD via the iMac is it a full install all the way to the desktop?
 

tsialex

Contributor
Original poster
Jun 13, 2016
13,455
13,602
No I understand that part im talking about installing macOS Catalina on the SSD via the iMac is it a full install all the way to the desktop?
Yes.

Boot-args need to be set from a supported macOS install in the Mac Pro, not from Catalina since without it you can't boot 10.15.
 

tsialex

Contributor
Original poster
Jun 13, 2016
13,455
13,602
So I need an extra hard disk in MP with Mojave installed?
Not necessarily, but you can't boot Catalina or Catalina Recovery without -no_compat_check, so you need at least a createinstallmedia USB key of Mojave for every time you clear NVRAM or have a problem.
 
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