![]() ![]() Next, let's open up a Terminal window and extract the package to a folder on our desktop. To start, grab the InstallMacOSX/InstallOS.dmg and mount it: Theres even a lovely color-coded space indicator like the one introduced with Mac OS X El Capitan, displaying content by Audio, Video, Apps, Images, and Other. This means we'll need to manually extract the installer. Your SMBIOS is too new to run that version natively (even if you're trying to make a USB for a different computer, it still checks). pkg inside.ĭepending on what OS you're on, you can install this package, which will provide you with a "Install (macOS version).app" and head to Setting up the installer however if you receive this error: Sierra: cd OSInstaller/InstallOS.pkg mv InstallESD.dmg Payload/Install macOS Sierra.app/Contents/SharedSupport/ mv. Download Download Summary of El Capitan Mac OS X El Capitan was the twelfth major release by Apple. How to get old versions of macOS (opens new window) (for 10.10 - 10.12 installers)ĭownload your desired version and a. File: InstallMacOSXElCapitan.dmg Language: English Developer: Apple Inc. ![]() Mac OS X Mountain Lion Installer (opens new window).Mac OS X Lion Installer (opens new window).To start, go to one of the following links: See Legacy macOS: Online Method for this version. Mavericks (10.9) is not available with this method. Getting started with ACPI (opens new window).Test the key and if ok, delete the working directories and files of this operation from the Desktop. Here you have to plug the USB key named KEY, then : sudo asr restore -source ~/Desktop/Installer.dmg -target /Volumes/KEY -noprompt -noverify -erase ![]() Hdiutil convert /tmp/Installer.sparseimage -format UDZO -o /tmp/Installer Hdiutil resize -size `hdiutil resize -limits /tmp/Installer.sparseimage | tail -n 1 | awk '' `b /tmp/Installer.sparseimage Rm -r /Volumes/install_build/System/Installation/PackagesĬp -av /Volumes/install_app/Packages /Volumes/install_build/System/Installation/Ĭp -av /Volumes/install_app/BaseSystem.chunklist /Volumes/install_buildĬp -av /Volumes/install_app/BaseSystem.dmg /Volumes/install_build Hdiutil attach /tmp/Installer.sparseimage -noverify -nobrowse -mountpoint /Volumes/install_build Hdiutil resize -size 8g /tmp/Installer.sparseimage Hdiutil convert /Volumes/install_app/BaseSystem.dmg -format UDSP -o /tmp/Installer You must then format a GUID partition scheme USB key of sufficient size (8 GB for El Capitan) named KEY in the example and execute the following instructions : hdiutil attach ~/Desktop/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app Then un-compact the structure using the tar command: tar -xvf Payloadįinally move the InstallESD.dmg file created by the tar command above to the Desktop mv InstallESD.dmg ~/Desktop Then position yourself in the InstallMacOSX.pkg "package" created by the pkgutil command cd ~/Desktop/Installer/InstallMacOSX.pkg Then, from the terminal (Applications/Utilities) un-compact the InstallMacOSX.pkg file in a directory (Installer for example) which will be created by the following pkgutil command: pkgutil -expand ~/Desktop/InstallMacOSX.pkg ~/Desktop/Installer Then open the dmg and copy InstallMacOSX.pkg on the Desktop. Start by downloading the El Capitan dmg from this link : Surely there is just an ISO I can get and write without all these hoops?s I assume the real problem is a system incompatibility. When I google this error some results indicate it is due to an expired file, but changing my system date to 2016 does not fix it. Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/MyUSBVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.appīut this yields /Applications/Install OS X El Capitan.app does not appear to be a valid OS installer application. dmg and then ran the terminal command from that support page: I used a utility to extract the Install OS X El Capitan.app file from the. Product: macOSXElCapitan.10.11.1.dmg Mac Size of App: 5.7 GB Dmg Version: 10.11.1 Setup Extension: dmg Tools for dmg needed: None Official site System Requirements of Mac OS X El Capitan 10.11. DMG is downloadable directly from the Apple Support page, which provides instructions on how to make a bootable volume, with a major caveat On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg Mac OS X El Capitan 10.11.1 Dmg Setup Details. I am running into walls trying to make the stick from my own computer, which is an M1 MacBook Air running Big Sur.Īn El Capitan. It seems to me next step is to try a bootable USB stick. It won't boot past a spinning progress bar on a grey screen, and will not boot into Recovery Mode or Safe Mode. ![]() It is running Snow Leopard but the most recent OS it supports is El Capitan. I am trying to rescue my dad's 2008 iMac. ![]()
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