![]() Once any of these downloads finishes, do not open the installer to begin the installation. For Destination, drag and drop the partition created on the USB drive onto the textbox and click restore/apply and when it's done, move to next step-ġ0-Restart Mac and push & hold option as soon as you hear restart sound until you see the gear on gray screen- 11-Choose base system.Mac App Store Links for Older macOS Downloads Note: it should be named “base system.dmg” or something very similar that’s not an example(this goes for official downloads only if it’s a torrent or other 3rd party download there’s no telling what it will be named).Ĩ-In the Disk Utility window, click on the newly formatted USB Drive in the menu, then click on the Restore tab-ĩ-drag the 'BaseSystem.dmg' over to the Source text box. Some systems scan it while mounting without notification. The important thing is that the "base system.dmg" shows up in the left panel of disk utility near the bottom. dmg)Ģ-insert a USB drive(i used 8GB) into the Mac and launch Disk Utility-ģ-click on the USB drive from the left-hand menu and select the Partition tab-Ĥ-Click the drop-down menu, selecting 1 partition-ĥ-for format select Mac OS Extended (Journaled)-Ħ-options select GUID partition then click apply-ħ**(A)=iMacs (B)=MacBooks/other(if one doesn’t work for you, just try the other)Ī)with disk utility open, choose the “base system.dmg” you want to put on the USB, now, go up to image menu, "scan image for restore"ī)>Find the install file you downloaded >Drag and Drop it into the left panel of disk utility in the blank space under everything else >sometimes double clicking on it works, sometimes right-click and ‘scan’ **(this step can be different depending on the version of imac/macbook.
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