I saw your post. I need help with restoring my Mac to a fresh install. I had to send my Mac to Apple for repair because I lost all of my data. I have downloaded all of the files for macOS Catalina. I have a new drive. I have put all of the files from the download on a second drive. I do not know if I have to select the version for macOS Mojave. Can you help me?
Hello Tom, I tried to repair the macOS Catalina start up disk using disk utility. But when first time the first aid option failed then again run the first aid. Disk utility showed the overlapped extent allocation error. But I could not replace the damaged file. I did not have the backup, and I was to regain my system. I found some software for disk recovery like Stellar Data Recovery for Mac, DiskDrill Data Recovery and Pandora. I downloaded free version of stellar and disk drill. Luck by chance I recovered in first attempt by stellar.
You can, however, download and install the new macOS High Sierra from the Apple website . If you run into any problems when installing this version of macOS, feel free to post a question at the Apple Support Communities.
The reason you cannot run a clean install of macOS Catalina is that this version of macOS only works on Macs that were manufactured in the last 2 years. This includes MacBook Pro, MacBook Air, and the iMac. Older Macs do not have a method of downloading and installing the new macOS Catalina.
Hi I have a MacBook Pro with 15inch Early 2015 model with MacOS Sierra 10.12.4. I am trying to use the macOS Catalina Beta Version 19A432a with InstallESD.dmg. But the installer failed to complete successfully as it said “Installer failed to verify the downloaded installer. Unable to verify the downloaded installer.” I have used the following software to repair the dmg file. I have repair the dmg file using disk utility. I have repaired the disk as it failed to get the system. Again I have repaired the dmg file using disk drill, but it was unsuccessful. I have also tried Stellar data recovery but it has not been able to repair the dmg file.
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