About 50% of my musical hardware still works perfectly with 32-bit driver. Where is High Sierra Installation file? I am a professional musician. If you migrate or transfer back any system or network setting you will be putting High Sierra If you go for the first method of a complete install of Sierra on your disk then when transferring information backįrom the back up you made prior to erasing High Sierra and installing Sierra that you only migrate or transfer The installer screen should start up, follow the prompts, one screen should ask you to select whichĭisk to install Sierra on make sure you select the new partition you created for Sierra.ĭecide what you are going to do, and make sure you understand exactly what you are doing before going ahead. When it boots to the bootable USB you will see a Utilities panel, select Install OS, press Continue. Restart the mac while pressing on the option/alt key.įrom the Startup Manager select the USB, press Return. To install Sierra on the newly created partition plug the bootable USB installer in to the mac. If you go that route to creating two partitions for a dual boot system then Quit Disk Utility and restart the mac normally. One partition with macOS Catalina (APFS) and one Mac OS X El Capitan Mac OS Extended (Journaled). When you are absolutely certain you want to do a dual boot system and are happy with the sizes you haveĬhosen for the two partitions then and only then click on Apply.īelow are two screenshots from my Mac Pro with one of the hard drives split to a dual boot system. Partition to be, on the right give it a name, and then the format should be Mac OS Extended (Journaled). Having set how much space you want the Sierra On the circumference to set the size for the Sierra partition. Click on the plus button and then use the toggle The free space which is available available for partitioning. You will see your Disk as a blue circle, the striped portion is the used space on the disk, the plain blue is Highlight the uppermost disk in the left hand column and click on Partition. Open Disk Utility, click on View in the menubar and select Show All Devices. If that is the case you would need to boot to your Recovery HD, (Restart and press and hold the Command and R keys) Or do you want a dual boot system, one partition with High Sierra and one partition with Sierra on it. The installer should start up, follow the prompts. When that completes you are ready to install Sierra, quit Disk Utility. Highlight the Disk, the uppermost icon in the left panel not the indented Volume. When the Startup Manager is shown click on the USB and press Return. Now that you have created the Sierra bootable USB, restart your mac while pressing and holding the Have you made a full back up of your mac.ĭo you want to do a complete roll back to Sierra so that Sierra is the only OS on your mac. The video is from 2018, prior to the expiry for the certificates for many OS's, Sierra was recertified in October 2019, thus the different method for installing and creating the Install macOS Sierra.app.
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