Clean install macOS 10.15 on a startup disk drive. Again, this is the recommended option that will leave you with a high-performing Mac. It involves lots of cleaning and securing your files, though. You can take care of all the data stored on your old OS manually, or by using a few easy utilities.
Time is running out for those looking to test the macOS 10.15 Catalina beta.Apple just announced the final version of the desktop operating system will arrive in mere weeks, with a note on its. This guide will show you how to make an install drive from the macOS Catalina 10.15 application. Having an install drive allows for deployment to multiple computers without re-downloading, performing clean installs, and booting to the installer’s built-in recovery tools for troubleshooting.
Create a diskimage (iso) on the Win 10 machine with IMGBURN:
http://www.imgburn.com/index.php?act=download
Install Mac Os 10.15 In Vmware
Check if that model has support for Internet Recovery. If you boot holding Command-R and you have a WiFi connection, it can actually boot into recovery mode without a recovery partition on a drive -- or even without a working drive.
Failing that, use TransMac, which has a 15-day trial period and works flawlessly.
- Make sure the USB drive is formatted using GPT. 'diskpart' on windows can do this. From an administrator rights (elevated) command prompt run:
(Find the disk number) - In the left pane, right click the USB Drive and select Format Disk for Mac
- In the left pane, right click the USB Drive and select Restore with Disk Image
- Point to your .dmg (or choose All Files to select an .iso) file and click Open.
Install Macos 10.15.6
It will take a few minutes depending on size of .dmg and speed of USB drive, but once done you can pop it into your mac, hold down the option key when turning on the mac and choose the USB drive.