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ssn637

macrumors 6502
Feb 12, 2009
458
51
Switzerland
has anyone been able to install Mojave on a MacBook Pro 2018 using USB?

No, I've been trying to perform a clean installation via a USB-C Flash Drive prepared with the latest macOS Mojave Beta 5 installer without luck. Even after disabling secure boot and selecting allow booting from external media in Recovery Mode, the system refuses to boot from the Mojave startup disk, claiming a software update is necessary.

If anyone has any luck with this, please advise! I've never had any problems performing a clean installation of Mojave Beta from a flash disk on my 2016 model. Perhaps the upcoming public beta version will solve this issue?

Edit:
OK, I was finally able to boot from the USB-C Flash Drive by first installing macOS Mojave Beta 5 from the application within the internal SSD and then rebooting into the USB-C Drive startup disk and performing the installation a second time after erasing the internal SSD. Apparently, the original system's macOS High Sierra was unable to boot from the external media, but after "upgrading" to Mojave Beta 5 the external disk was recognized and I could proceed.
 
Last edited:

shmounism

macrumors newbie
Jul 15, 2018
11
4
No, I've been trying to perform a clean installation via a USB-C Flash Drive prepared with the latest macOS Mojave Beta 5 installer without luck. Even after disabling secure boot and selecting allow booting from external media in Recovery Mode, the system refuses to boot from the Mojave startup disk, claiming a software update is necessary.

If anyone has any luck with this, please advise! I've never had any problems performing a clean installation of Mojave Beta from a flash disk on my 2016 model. Perhaps the upcoming public beta version will solve this issue?

Edit:
OK, I was finally able to boot from the USB-C Flash Drive by first installing macOS Mojave Beta 5 from the application within the internal SSD and then rebooting into the USB-C Drive startup disk and performing the installation a second time after erasing the internal SSD. Apparently, the original system's macOS High Sierra was unable to boot from the external media, but after "upgrading" to Mojave Beta 5 the external disk was recognized and I could proceed.

Thanks for the tip. just tried that and it worked like a charm
 

maxbsan

macrumors newbie
Oct 21, 2010
5
4
San Diego
Hi! Has anybody installed Beta 5? I got my MBP on Sunday and installed Beta 4, and I have the brightness issue also, so I want to know if it's solved in beta 5, or if it's just easier to downgrade to High Sierra
 
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shmounism

macrumors newbie
Jul 15, 2018
11
4
Hi! Has anybody installed Beta 5? I got my MBP on Sunday and installed Beta 4, and I have the brightness issue also, so I want to know if it's solved in beta 5, or if it's just easier to downgrade to High Sierra
was able to install latest beta and no issues
 

GuruZac

macrumors 68040
Sep 9, 2015
3,748
11,734
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I'm on a 2017 MBP and just tried to download Beta 5 and it gave me this message:

Screen Shot 2018-08-01 at 5.35.28 PM.png
 
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GuruZac

macrumors 68040
Sep 9, 2015
3,748
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Yes FileVault is on and is currently encrypting with no option to end encryption. So basically I have to wait until it's done, then turn it off and there will be a selection to decrypt?

And thank you for the heads up on that.
 
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TimothyR734

macrumors 68030
Apr 10, 2018
2,723
2,753
Logsden Oregon
Yes FileVault is on and is currently encrypting with no option to end encryption. So basically I have to wait until it's done, then turn it off and there will be a selection to decrypt?

And thank you for the heads up on that.
when you turn it off it should decrypt I accidentally did that on my iMac but it takes awhile both ways
 
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maxbsan

macrumors newbie
Oct 21, 2010
5
4
San Diego
Yes FileVault is on and is currently encrypting with no option to end encryption. So basically I have to wait until it's done, then turn it off and there will be a selection to decrypt?

And thank you for the heads up on that.
You should just wait until the encryption process is done, and then try the installer. I have FileVault enabled and I was able to update, you just cant while it's working on it.
Leave FileVault on, it's more secure. Unless the installer tells you it is not possible, you could then turn off FileVault and decrypt, but I don't think that's gonna be an issue.
 
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m-e

macrumors 6502
Aug 6, 2015
253
100
You should just wait until the encryption process is done, and then try the installer. I have FileVault enabled and I was able to update, you just cant while it's working on it.
Leave FileVault on, it's more secure. Unless the installer tells you it is not possible, you could then turn off FileVault and decrypt, but I don't think that's gonna be an issue.
I also have FileVault on and never had this issue. I would also recommend just waiting for encryption to finish then do the update.
 

GuruZac

macrumors 68040
Sep 9, 2015
3,748
11,734
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Thanks guys. I had already turned off FileVault so waiting for that to decrypt before starting the long process of turning FileVault back on and encrypting. Once that is back on, I will attempt to download Mojave Beta 5.
 

GuruZac

macrumors 68040
Sep 9, 2015
3,748
11,734
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So I turned FileVault back on last night and it finished up this morning around 11:30 CST. I'll keep it on from here on out. Just reviewing some of the bugs in Mojave, is it worth downloading yet on a 2017 MBP? I basically just want to see the dark mode. I'm not lacking any features in High Sierra for what I use this for.
 

csurfr

macrumors 68020
Dec 7, 2016
2,310
1,748
Seattle, WA
Out of curiosity, has anyone with a 2018 MacBook Pro been able to revert back to High Sierra with the Internet Recovery option? Has this been fixed yet?
 

philotas

macrumors newbie
Dec 24, 2007
29
9
Spain
For me installing Mojave over High Sierra and then a clean install also worked to bypass this "needs a software update" message
 

Sunsenista1984

macrumors newbie
Dec 26, 2015
2
0
Out of curiosity, has anyone with a 2018 MacBook Pro been able to revert back to High Sierra with the Internet Recovery option? Has this been fixed yet?
Yes I did it! back from Mojave to a complete re-install of High Sierra via their Internet Recovery mode... Didn't work first maybe due to connection issue in China but as I am in Japan I was able to do it like 2 days ago! Work like a charm now. Will wait for some software to be released before going to Mojave like Logic X Final Cut and so on...
 

picklebreath

macrumors newbie
Mar 13, 2017
4
0
Yes I did it! back from Mojave to a complete re-install of High Sierra via their Internet Recovery mode... Didn't work first maybe due to connection issue in China but as I am in Japan I was able to do it like 2 days ago! Work like a charm now. Will wait for some software to be released before going to Mojave like Logic X Final Cut and so on...
Full release does not install on newer MBP. Many have the same issue on Apple support forum.
 
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