23.12.2020

Mac Os Boot Disc From Install App

Mac Os Boot Disc From Install App Rating: 9,2/10 7171 votes

If you use pkgutil to expand the InstallMacOSX.pkg it opens to three items, the Distribution file, InstallMacOSX.pkg and Resources. You can alter the Distribution file to ignore the supported platform check, see below.

This is a Bootable, Universal Install CD-ROM of Mac OS 9.2.2, US English. Suitable for G3 & G4 Macintosh models capable of booting from a Classic Mac OS via CD-ROM. Mac OS CPU Software 4.9, includes the Mac OS ROM file v9.2.1 Top DL: The 9.2.2 universal OS installer CD's archive is a.zip compressed.iso image.It is OK to burn this back to CD using ImgBurn on Windows or Disk Utility on Mac.

  1. Download the Yosemite installer from the Mac App Store and make sure it’s in your main Applications folder (/Applications)—it’s called Install OS X Yosemite.app. Connect to your Mac a.
  2. Rufus (Windows) When it comes to creating a bootable USB drive in Windows, Rufus is undeniably.
  3. Under the pop-up menu, you’ll see Select the OS X installer. (macOS used to be called OS X.) If you have only the Catalina installer on your Mac, Install Disk Creator will automatically.
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Creating the Install OS X El Capitan.app on a mac that came with a newer OS than El Capitan.


Download the InstallMacOSX.dmg from Section 4 of How To Upgrade To El Capitan

Double-click to open InstallMacOSX.dmg to Install MacOSX.pkg.

Drag InstallMacOSX.pkg to the Desktop.


Open Terminal, enter the text




A folder will be created on the Desktop after a while with the contents of the .pkg file.

In there you will see an item called Distribution, Control-click on that and select Open With

go to Other and select Text Edit.


When the file opens scroll down to the section that reads,



function isSupportedPlatform(){


type in at the end return true; so it now reads as,



function isSupportedPlatform(){return true;


Now click Save and close the document.


Go back to Terminal and enter the text,



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press Return, after several minutes, be patient, (check to see if the prompt has returned to Terminal) a new package will be created on the Desktop.


When created double-click on that and an installation window will open where you will now convert the

new InstallElCapitan.pkg to the Install OS X El Capitan.app which will be placed in your Applications folder.

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You can now create a bootable USB using the install app and createinstallmedia,



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If you have the time I would be grateful if you could give this a trial, it works here on my mac, but I would like confirmation from yourself or any others reading this that the procedure works on macs that came with macOS Sierra or newer pre-installed. Oh and tell me if my description of the procedure is easy to follow and understand.



The idea behind a macOS Clean Install

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/top-mac-productivity-apps.html. When you install a new major version of OS X, or after some time has passed, it is a good idea to do a clean install (that is, to erase the disk you are installing OS X onto as part of the installation process).

That will make your Mac run blazingly fast for a few months or more, and many people report that it fixes longstanding problems they’ve had too.

It used to be common practice to occasionally run a clean install, and then manually migrate all the files and settings over in order to get a completely fresh start. However, it has been shown in recent times that in the vast majority of cases if you simply run a clean install, then duplicate your old home folder to your new disk, you will get all of the same advantages as a clean install followed by manual migration, with a small fraction of the effort.

Mac Clean Install Procedure

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Here is the clean install procedure which can be performed at least every time a new version of macOS is released:

  1. Download the macOS installer from the App Store. You can download macOS High Sierra by clicking here.
  2. Backup all the data to an external disk with a clone. Two options are to use Duplicate (a free utility which can copy and paste an entire bootable volume), or Mac Backup Guru (a paid, fully featured backup utility with unique incremental backups capability) for that.
  3. Create a bootable USB Installer with Install Disk Creator and boot from it. Erase the startup disk and install macOS onto it. Boot up from this newly created startup disk.
  4. Note: The Finder’s built-in “Copy” and “Paste” will not work for the following.
    Go to the backup disk and use Duplicate (free) or Mac Backup Guru to right-click and select Copy on the home folder (eg: External Backup/Users/Bob) and then Paste on the Macintosh HD/Users folder on the startup disk. This migrates all of your personal data and settings to your new home folder.
    Then migrate the applications by selecting Copy on the External Backup/Applications folder on the backup disk then Paste on the startup disk (eg: Macintosh HD). This will copy all of the applications which are present on the backup disk but not present on the startup disk to your new Applications folder, and automatically skip any applications which are already on the startup disk.

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At this point, after a reboot and some minor adjustments (the Dock may not have your previous configuration for example, if you did this while logged into the same user account as you just updated), your new OS should be indistinguishable from your previous one, while being faster and smaller due to reduced clutter.