How to Downgrade Mac Os Without Time Machine?

How to Downgrade MacOS to a Previous Version

Download the installer for the macOS version you want to install.
Once downloaded, dont click on Install! ...
Once done, restart your Mac.
In Recovery mode , select “Reinstall macOS” from Utilities.
Once done, you should have a working copy of an older version of macOS.

How do I Downgrade my MacOS High Sierra Without Time Machine?

Plug the new bootable installer into your Mac.
Restart your Mac, holding the Alt key and, when you see the option, choose the bootable install disk.
Launch Disk Utility , click on the disk with High Sierra on it the disk, not just the volume and click the Erase tab.

How do I Install an Older Version of OSX Without Time Machine?

Power on your computer and immediately hold Shift + Option + Cmd + R. Youll notice startup takes longer than normal as macOS Recovery loads. Once the macOS Utilities screen loads, choose Reinstall macOS or Reinstall OS X and click Continue. Follow the prompts and choose your startup disk.

Can I Revert to Older MacOS?

There are two ways to downgrade your Mac to a previous version . You can restore through Time Machine or install macOS from a USB. Taking the Time Machine route is the easiest, although this assumes you have a Time Machine backup of your system that predates your installation of macOS Big Sur.

How do I Downgrade from Catalina to Mojave Without Time Machine?

In the macOS Utilities window, click Disk Utility. Select the hard drive with Catalina on it Macintosh HD and select Erase. Give your Macs hard drive a name, select either Mac OS Extended Journaled, and then click Erase. Select APFS if downgrading to macOS 10.14 Mojave.