11 May 2021 Update: I have discovered that an easy fix for this was replacing the RAM. I had bought non APPLE ram for my Mac Mini and although the RAM was working fine, I believe during the update process, Apple checks hardware and the RAM was causing issues. Adda 247 app for pc. This has been confirmed by my local Apple Store and I have since replaced the RAM with another set from a different third party and everything is working smoothly.
On June 22, Apple introduced macOS Big Sur and till this very date I have mixed feelings on this recent release. However, I noticed that my beloved 2012 Mac mini is no longer supported. This means macOS Catalina will be the last Mac operating system to support my Mac mini. What was surprising to me, I had not updated my Mac mini from Mojave to Catalina. So, I updated it, and this happened:
There are several solutions that were recommended, but none I found convincing. I did not want to lose any data, and I did not want to start from scratch on this Mac as It has been running for years and does all kinds of things and workflows that will be too time consuming to re-setup.
My solution
Solution to macOS Catalina failed download: 1. Make sure Apple servers are not loaded – The first step to ensure is the availability of the Apple servers. Go to this page and check th e status of major apple services. The macOS update server should show green status. How to fix macOS Catalina boot problems. If you've installed macOS Catalina, but your Mac won't start, then restart your Mac and hold down Command, Option, P and R, which will reset the NVRAM (non.
Catalina Update Failed Without
You will need:
- Another Mac other than the one that has this issue (in my case 2016 MacBook Pro)
- External drive (I used my Samsung T5 SSD) formatted in APFS
- SuperDuper : best macOS backup app
From Mojave, open the terminal and download directly by copy & paste: softwareupdate -fetch-full-installer -full-installer-version 10.15.3. (to proceed use the enter return key) It will down load to your default location. Once downloaded, reboot into Safeboot mode—then launch the 'Install macOS Catalina.app' like any other applications.
Solution: Use another Mac to update from Mojave to Catalina. The entire process took 3 hours.
The following worked for me:
Step One: Make a SuperDuper backup of the Mac mini on the Samsung T5. Now your Samsung T5 is the replica of macOS that was running on your Mac mini.
If your current macOS is macOS Mojave, and can’t update to macOS Catalina. Restart to Safe mode, Start or restart your Mac, then immediately press and hold the Shift key. Release the Shift key when you see the login window. Then your computer doesn’t need to hold any keys/buttons during startup. This is unrelated to the new IOS13/IpadOS/OSX 10.15 (Catalina) beta code. IOS updates are in no wa tied to OSX updates. I've been an Apple developer for a number of years now and the consistent pattern appears to be IOS update followed by a macOS update a couple of days later.
Step Two:Connect the Samsung T5 to MacBook Pro. The Samsung T5 will show up as external hard drive on the MacBook Pro.
Step Three:Download the macOS Catalina on the MacBook Pro. It's an 8gb file so grab a drink or watch your favourite TV show.
Movies using exodus kodi. Step Four: Run the Catalina installer on the MacBook Pro. When the installer asks which hard drive to install in, select the Samsung T5 external hard drive. The installation will take some time and your MacBook will restart many times. Once the installation has been successful, shutdown your MacBook and remove the Samsung T5.
Step Five: Boot Mac mini from the external drive by using Startup Disk option. The idea is to use the external drive to boot your Mac mini to confirm that the Catalina update is working on the Mac mini.
Step Six:Use SuperDuper to transfer from Samsung T5 to the Mac mini hard drive. You do this by backing up the Samsung T5 to the existing hard drive on the Mac mini.
Step Seven:Once the above SuperDuper process is complete, boot your Mac mini from your Mac mini hard drive using Startup Disk option
Step Eight:Enjoy Catalina without losing any data or reinstalling anything.
This method worked for me. Should you require any clarification, please contact me on @MereCivilian or email me: [email protected]
If you're using one of these computers with OS X Mavericks or later, you can install macOS Catalina. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier. Learn how to upgrade to macOS Catalina.
MacBook Pro
- MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)
- MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
- MacBook Pro (16-inch, 2019)
- MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
- MacBook Pro (15-inch, 2019)
- MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
- MacBook Pro (15-inch, 2018)
- MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)
- MacBook Pro (15-inch, 2017)
- MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)
- MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)
- MacBook Pro (15-inch, 2016)
- MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)
- MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)
- MacBook Pro (Retina, 15-inch, Mid 2015)
- MacBook Pro (Retina, 15-inch, Mid 2015)
- MacBook Pro (Retina, 13-inch, Early 2015)
- MacBook Pro (Retina, 15-inch, Mid 2014)
- MacBook Pro (Retina, 13-inch, Mid 2014)
- MacBook Pro (Retina, 15-inch, Late 2013)
- MacBook Pro (Retina, 15-inch, Early 2013)
- MacBook Pro (Retina, 13-inch, Late 2013)
- MacBook Pro (Retina, 13-inch, Early 2013)
- MacBook Pro (Retina, 15-inch, Mid 2012)
- MacBook Pro (15-inch, Mid 2012)
- MacBook Pro (Retina, 13-inch, Late 2012)
- MacBook Pro (13-inch, Mid 2012)
MacBook Air
- MacBook Air (Retina, 13-inch, 2020)
- MacBook Air (Retina, 13-inch, 2019)
- MacBook Air (Retina, 13-inch, 2018)
- MacBook Air (13-inch, 2017)
- MacBook Air (13-inch, Early 2015)
- MacBook Air (11-inch, Early 2015)
- MacBook Air (13-inch, Early 2014)
- MacBook Air (11-inch, Early 2014)
- MacBook Air (13-inch, Mid 2013)
- MacBook Air (11-inch, Mid 2013)
- MacBook Air (13-inch, Mid 2012)
- MacBook Air (11-inch, Mid 2012)
MacBook
- MacBook (Retina, 12-inch, 2017)
- MacBook (Retina, 12-inch, Early 2016)
iMac Pro
Catalina Installation Failed
iMac
- iMac (Retina 5K, 27-inch, 2020)
- iMac (Retina 5K, 27-inch, 2019)
- iMac (Retina 4K, 21.5-inch, 2019)
- iMac (Retina 5K, 27-inch, 2017)
- iMac (Retina 4K, 21.5-inch, 2017)
- iMac (21.5-inch, 2017)
- iMac (Retina 5K, 27-inch, Late 2015)
- iMac (Retina 4K, 21.5-inch, Late 2015)
- iMac (21.5-inch, Late 2015)
- iMac (Retina 5K, 27-inch, Mid 2015)
- iMac (Retina 5K, 27-inch, Late 2014)
- iMac (21.5-inch, Mid 2014)
- iMac (27-inch, Late 2013)
- iMac (21.5-inch, Late 2013)
- iMac (27-inch, Late 2012)
- iMac (21.5-inch, Late 2012)