Questions tagged [bootable-disk]

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Bootable Drive Problem

I've followed this guide on creating a bootable drive to downgrade from Big Sur for MacOS Catalina. I bought a new flash drive, plugged it in and erased it. I set the SanDisk Cruzer Blade Media to a ...
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63 views

Booting MacOS Big Sur from USB not working (MacBook Pro mid 2015)

Have created a bootable USB installer according to these instructions: https://support.apple.com/en-us/HT201372 for my MacBook Pro mid 2015 (A1398). Pressed Option key while booting, selected the USB ...
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24 views

Corrupted USB Pendrive is not listing in Disk Utility, but listed in ioreg -p IOUSB

I was attempting to create a bootable Windows 10 USB stick with help of Rufus. I ran it on a Windows 10 VM (via VMWare Fusion) and left Rufus do the job. After a couple of hours, I came back to check ...
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2answers
129 views

Making an ISO file from an Apple provided DMG file? [duplicate]

I'd like to make a bootable ISO file from Apple-provided DMG file located under Download macOS using Safari on your Mac from: https://support.apple.com/en-us/HT211683. They provide a DMG file with a ...
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1answer
54 views

Problem creating a Windows 10 bootable USB on Windows, to work on a MacBook Pro

I have a MacBook Pro 2013, now with a clean SSD (no OS). I have a Windows 10 PC from which I am trying to create a bootable USB from a Windows 10 ISO file. I tried a lot of combinations and softwares, ...
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1answer
191 views

How can I create a BIOS USB stick for ASUS ROG Strix X570-F in OS X?

I need to install a new BIOS for my new motherboard ASUS ROG Strix X570-F here where I need USB flashback tool and BIOSRenamer. I need flash an USB stick and then rename the file somehow but the tools ...
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2answers
159 views

Mac not bootable, save files with other mac

I am looking for a way to recover files from a Mac. Following facts: The files I want to recover are on Mac #2. I have another Mac if I need it. Mac #2 no longer turns on. It no longer boots up. It ...
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1answer
93 views

How can I make a bootable USB copy of Mojave downloaded from Apple when the file is an app and not a disk image?

When I try to open the Mojave install app on my computer with Big Sur, it says that the operating system is too old and so it will not let me open it in order to install it on the external usb drive. ...
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1answer
35 views

Can I boot from a USB stick containing MacOS if there is an issue with MacintoshHD?

So my mac HD started playing up and then refused to work, would not boot. Tried recovery mode but it wouldn't allow me to run first aid on the Macintosh HD drive. Created a MacOS USB boot up stick by ...
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26 views

Holding down the option key isn't allowing me to see boot menu on iMac mid-2010

I get an old iMac mid 2010 without hard drive and when I press "alt" on Windows keyboard (equivalent of "option" on Mac) nothing happens. Then the Apple logo appears with a charge ...
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26 views

I have latest version of Big-Sur installed on my mac. How can I re-download Big-Sur to create bootable usb for Mac? [duplicate]

Sorry for the mistakes -if any- on the title. I have problem. I have a 2015 model macbook air a1465. I will change the ssd. Before that I want to make a bootable usb mac Big-sur. For that I tried to ...
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1answer
462 views

Big Sur bootable installer cannot be created or corrupted after creation

I have an iMac 27" 2015 that I want to do a clean install of Big Sur on it. I followed the tutorial on creating the bootable installation media but it failed with an error: "/Applications/...
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1answer
51 views

How to change USB scheme when making bootable Catalina installer?

Background: Upgraded to Big Sur on 2020 MacPro (not the one with M1 chip), hate it, trying to revert to Catalina using a USB bootable installer (followed instructions given at the Apple website How to ...
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1answer
264 views

How to create a bootable USB Drive that will boot on BOTH an Intel Mac and a PC

I recently created a bootable USB Thumb Drive containing a Linux Live Distro. I created it on a PC running Windows and tested it successfully on the same PC. Now I want to run the same Linux OS on my ...
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0answers
21 views

Mac recognizes usb installer, but instead of booting into it, it boots from internal hdd

I've used this usb drive in the past to restore macs and I don't remember what I did to get it to work. I get into the drive selection for booting, the usb with high sierra installer is there, but ...
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28 views

OSX_10_13_IncompatibleAppList.pkg file missing after downloading High Sierra installer

I followed this thread to create a boot installer for MacOS High Sierra without error, through VMWare, since the file that was being downloaded from Apple Store was a stub. Everything went fine. The ...
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6answers
46k views

How can I download the macOS Big Sur installer on a Mac which is already running Big Sur?

I'm trying to create a Big Sur installer flash drive. All the tutorials tend to gloss over how to download the installer, but I'm finding that since this Mac is already upgraded, I can't download it ...
0
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1answer
63 views

How to make a bootable, *usable* macOS USB key (NOT an installer)?

2011 iMac running Sierra I would like to have a copy of macOS that I can actually boot from and use on a USB key, so that I can run Carbon Copy Cloner from it to make backups of any volume on the ...
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0answers
47 views

SSD upgrade for iMac 2007 - criteria [closed]

I'm looking to upgrade my slow 2007 iMac with a new 1TB SSD and looking for recommendations on what parameters to look - that is, which SSDs are compatible with my older iMac, and which are best? It ...
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2answers
684 views

Macbook Air 2019 will not boot from USB or complete Internet Recovery, Exhausted options

Internet Recovery fails. USB Boot fails. Target mode won't mount. Macbook Air 2019 TrueTone, ran before I deleted the SSD (stupid). Battery shot, requires power supply to run. Tried Internet Recovery ...
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2answers
25 views

If I make a bootable pendrive running macOS, will downloaded apps and data persist on each boot?

Sorry if this seems like a basic question, but I couldn't find a clear statement on this anywhere: I wish to make a bootable pendrive running macOS Mojave, so that I can run some 32-bit apps. So I ...
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2answers
1k views

Unable to install macOS Catalina with bootable USB without macOS recovery partition

I had deleted the macOS and macOS recovery partitions many months ago to increase the capacity for the Bootcamp Windows. Now I want to reinstall macOS via a bootable USB, but on booting into it, it ...
6
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2answers
17k views

How to create a bootable OS X Snow Leopard USB drive?

How can I achieve this from either macOS Catalina or Windows 10? I can't seem to find a guide online. I've downloaded Mac OS X Snow Leopard Install DVD from the Internet Archive. Keep in mind that ...
1
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1answer
56 views

Is there any way that we could load disk utility or any disk repair tool from a USB in mac?

Recently my Mac crashed due to kernel panic. I tried using disk utility to repair the disk but the parent disk couldn't be repaired. And I opened up the terminal and erased the current boot disk. And ...
2
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1answer
3k views

How can you create a valid/reliable disk image of APFS drives?

Last year before Catalina was released, I tried to perform a disk image of my boot drive of Mojave (macOS 10.14) on a new computer before updating and customizing it. I have done this for years to ...
1
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1answer
72 views

Mac Pro not booting after update

Mac pro 2009 4,1 Boots up but no video output (black screen). It was working fine on the old OS that was on it(not sure which OS). I want to update to the highest OS (el capitan) it can run. So I did. ...
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1answer
2k views

The app store download could not start because it has already been downloaded too many times

I wanted to reinstall mac on my Apple Macbook Air 2017. I restarted my Mac while holding down Command+R and Erased the disk in "Disk Utility". I clicked on "Reinstall macOS" but I ...
0
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1answer
108 views

iMac in recovery mode, can’t install macOS no matter what I try

My wife and I purchased an desktop iMac A1311 from Facebook market place. It was perfectly functional but the seller hadn’t removed any of their personal info before selling it so my wife erased it (I ...
1
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0answers
25 views

Error Installing Lion MAC OS on my Mac/book Pro Early 2011

Background: I purchased an old Mac Book Pro early 2011, It came with High sierra installed. Unfortunately I leave the mac on without the power cable, the mac entered into hibernation mode and ...
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0answers
144 views

Mac unable to boot memtest86 usd drive

I've just downloaded MemTest86, written it to a USB flash drive using Etcher, but I'm unable to boot from it. I can't see it in the boot options. What am I doing wrong? The main issue is my Mac keeps ...
2
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0answers
78 views

Booting iMac from External SSD & UASP support in iMac, Docking station or USB to Sata Adapter?

I have Late 2013 iMac which has 5400 RPM HDD and I find it really slow. So, I purchased a Crucial MX500 SSD. I have now cloned my HDD to SSD using superduper and then booted from it. It worked. But I ...
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0answers
55 views

Unable to Download macOS Mojave from App Store, error prompted: "Update not found, the requested version of MacOS is not available" [duplicate]

I'm running Catalina on a MB Pro 2019 and I'm trying to create a separate volume running Mojave through a bootable external device. I've been doing this earlier this year and I had no problem ...
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0answers
2k views

Error on EL Capitan Installation This copy of the Install OS X El Capitan application can't be verified. It may have been corrupted or tampered

I have created bootable pendrive using https://support.apple.com/en-in/HT201372 I am trying to dump ELCapitan on my mac. but it throwing error This copy of the Install OS X El Capitan application can'...
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0answers
83 views

Bootable pendrive takes lot of time during 'Copying installer files to disk...'

I am creating bootable pendrive with MacOS_ELCapitan using Macbook Pro 2019(Cataline). using https://apple.stackexchange.com/a/388508 this thread. But i am getting Copying installer files to disk... i ...
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2answers
292 views

USB became write-protected after trying to install Windows on BOOTCAMP

I tried to install windows using BootCamp, and it formatted my usb and loaded windows files and gave me an error that not enough space available, so I changed my mind and wanted to use my pen drive ...
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0answers
18 views

Creating a OS X El Capitan bootable installer on a MacBook Pro to reinstall a MacBook Air

Is it possible to create a bootable USB installer on a MacBook Pro and use it to install macOS on a MacBook Air? For example, I'd like to use a MacBook Pro to create a bootable USB installer for El ...
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0answers
65 views

iMac will not boot after Catalina auto-update

I woke up the other morning to a prohibitory icon (circle with a line through it) on my iMac. I believe this was due to a failed Catalina update but I am not sure. I had it set to auto-update. I am ...
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1answer
74 views

Create bootable macOS USB for a non Apple computer [closed]

I tried several ways to create a bootable macOS USB for a non Apple personal computer. I expected it to work exactly like my bootable Ubuntu USB. macOS bootable USB seems to be working differently. It ...
0
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1answer
303 views

21.5" iMac Mid 2010 Won't Boot from USB to Install High Sierra

I tried clean installing High Sierra in by making bootable USB. I did the following: PRAM Reset Pressed Option Key at the Startup Choose USB with Install High Sierra from the Drives The Apple logo ...
1
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1answer
3k views

Bootable drive - disk is locked error

So I've followed the apples guide and also another guide on here on creating a bootable drive for MacOS Mojave. I bought a new flash drive, plugged it in and erased it. I set the SanDisk Cruzer ...
3
votes
4answers
11k views

Could not validate sizes – Operation not permitted. The operation couldn’t be completed. (OSStatus error 1.)

I am following instructions for creating a Bootable drive (generously provided in this answer by a gentleman named David Anderson). I am using a 16GB SD card to try to create a Bootable drive from my ...
1
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1answer
504 views

System hangs when creating bootable disk drive

I followed the instructions provided in this answer which explains how to make an El Capitan bootable disk from a system running Catalina I copied the commands exactly as prescribed, reproduced here: ...
1
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1answer
614 views

How do I use a bootable disk drive to install Mac OS on an iMac 2011?

I asked earlier about how to create a Bootable drive for the purpose of installing Mac OS on an older machine, and I received a great answer (thanks to @David Anderson). However, now that I have the ...
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2answers
1k views

How do I install Mac OS X El Capitan on my other iMac? [duplicate]

I'm relatively new to Mac and I cannot for the life of me figure out why it is so complicated to download an OS installer, create a bootable disk and use it on another machine. According to the ...
1
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1answer
45 views

How can I create a USB installer of OS X - El Capitan on a computer that is running macOS Sierra? [duplicate]

I've downloaded a copy of the OS X - El Capitan Installer, which I want to make a bootable USB of. However, it requires you to run the installer on whatever machine you are running, and installs it ...
0
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1answer
793 views

Downloaded InstallMacOSX.pkg gives an error of "This version of OSX 10.11 cannot be installed on this computer." Why?

I downloaded InstallMacOSX.pkg to create a bootable USB drive and install OSX El Capitan on a separate computer. That computer was shipped with El Capitan. So, I am not installing it on the computer ...
2
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1answer
116 views

How to boot into Windows on SSD from macOS

I have a MacBook Pro (13-inch, 2018) running macOS Catalina (10.15.2). I have an old laptop that died, but that still has a (newer) functioning SSD. This SSD has Windows 10 already installed on it, ...
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0answers
28 views

2017 MacBook Pro has no startup disk when updating MacOS beyond Sierra

My 2017 15" MacBook Pro gives a flashing question mark every time I try to update to a newer OS. The install process looks completely normal until it restarts for the last time and boots up to a ...
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0answers
2k views

Create an old bootable USB Stick Sierra or High Sierra on a brand new Mac with Catalina

All I need is just an install media for sierra or high sierra. Sound's easy but unfortunately isn't. I have a MacBook Pro 13" with the latest Catalina installed (10.15.3). To download High Sierra ...
1
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0answers
960 views

Marking the EFI system partition on a USB flash drive as bootable

Using only MacOS (no GParted or other Linux utilities), how do I mark the EFI system partition on a USB flash drive as bootable? Insert an empty USB flash drive and launch Disk Utility Erase the ...

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