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Installing a new version of the Mac OS is generally a fairly pain-free process; this trend continues with macOS Catalina. You should also take basic steps to ensure you can recover from any install issues you may come across. The most important of these is to back up your Mac before you start the installation process so that you can recover from any installation issues that may arise.
If it does get your Mac going again, remember to back up your Mac before you go any further. If you need a storage solution to handle your backups, Other World Computing has a large selection of storage options you can choose from. You can find a full list of supported Macs in the Rocket Yard guide:. A clean install uses up around 20 GB of storage space.
In addition, you need to allow for space for your user data, applications, and future updates. But if you have 25 GB of free space available, you should be able to successfully perform an install of Catalina. OWC has you covered if you need to go this route:. This message or a variant will sometimes show up just after you start the installation process, and is most often caused by a corrupt installer file. The simple solution is to delete the macOS Catalina installer and download a new copy.
You can find instructions on using First Aid in:. This, in itself, is not an issue. However, in rare occurrences, you may see an error message.
If you encounter this issue, the cure is easy enough: you just need to erase the target drive using Disk Utility. This may seem like the same issue we started this article with: having a Mac that is supported by Catalina. The difference is that you already verified that your Mac is compatible see the link to supported Macs above , but you still see the error message.
Make sure you have both the correct time and the current date properly configured. These are actually two issues; the first is the installer freezing during the first phase of the installation process, and the second is when the failure to complete happens after your Mac has rebooted and attempts to load Catalina for the very first time. In both cases, the first thing to try is to restart your Mac. This fixes the issue for most users experiencing this problem. One of the features of newer Macs is the incorporation of T2 Security Chips, which provide a number of useful features, one of which is the ability to erase and deactivate your Mac if it is stolen.
During beta testing, a few people reported that Catalina was failing to complete the installation because it believed the Mac had the activation lock set as if it had been reported stolen. You can correct this issue by using another Mac or iOS device and launching the Find My Mac app, or opening a browser and going to the iCloud. Log in to your iCloud account, if needed, then remove the Mac in question from being associated with your Apple ID.
This issue can occur because of the T2 Security Chip found in recent vintage Macs. The T2 chip protects your Mac by default from being booted from an external device. This prevents someone from walking up to your Mac with a USB flash drive, booting your Mac, and accessing your files. You can find out more about the T2 Security Chip and how to use the Startup Security Utility to configure external boot options in the Rocket Yard guide:. In the case of not being set, your Mac may take a very long time to start up as it searches for a device to use to start up from.
In actuality, the clean install was performed, the Mac is just booting from the wrong startup device. The fix is to open the Startup Disk preference pane and set the startup disk correctly for your Mac.
If either becomes corrupt, it can cause unusual effects on your Mac. Although resetting the NVRAM and SMC are considered a last-ditch effort to correct a problem, you should still try it because it does work from time to time. This is our preliminary list of Catalina installation issues you may come across. With that in mind, did you have any issues installing macOS Catalina, and if so, did you discover a fix for the problem? If all else fails with your Catalina install and you want to downgrade, check out our article, How to Downgrade from macOS Catalina to Mojave or Earlier.
Save my name, email, and website in this browser for the next time I comment. Notify me of follow-up comments by email. Notify me of new posts by email. I owned a MacBook Pro early and was gifted a Mid ; It appeared to be cleared of the old system with no personal files etc. I used my Time Capsule backup to as prompted upload everything thing from my recent backup to the Macbook.
What did I do wrong? The Genius Bar installed Catalina on my computer. I had High Sierra. Please Advise! Can you please reply me or lead me to help me to solve the problem? Because I need to use laptop badly. Downloaded from the Apple App store from a link, but feel it is not supported. Tring to upgrade from MoJave to Catalina and it tells me I must install catalina before installing catalina.
Trying to install This is on a Mac Mini. Was having issue with supported Mac on external drive via USB hub, the installer was allowing installation to the external drive but keep back to internal drive after reboot..
I click continue and it just sits there with the continue button greyed out and never progresses to the next screen. I tried restarting my computer, but no luck. Catalina would not install on 27 inch late running Mavericks. Tried stub installer from apple and full installer using patch app.
Got full installer to run after starting in safe mode. Installer would then prompt for password, then off to the installation. Maybe it was a permissions thing, but who knows…. Since I reinstalled Catalina I get an insufficient disk permissions, message.
I have tried several fixes found on chat boards but nothing has worked. Catalina would not install because of a memory issue with my Late iMac. Any ideas? Hi Geoff! Any help please. Stay safe. I download the file and start the installer. The volume does not meet the requirements for this update. So what is causing the problem? Still looking for a solution…. One thing that worries me is: although it is a mid non retina, and supposedly compatible with Catalina, the specs are 2. This appears to be a low end model, more like late I thought 2.
I am trying to upgrade from Mojave to Catalina on Mac Air early , I received an error from the Catalina installer that this upgrade requires a firmware update. I am on APFS. Does anyone know a solution for this issue.
I have MacBookAir mid So I tried the installation of macOS Catalina. I was upgrading from Mojave The download failed halfway giving me a network error.
And every time I try to redownload it from the beginning it has been giving me this error. But the downloads been eating my disc space, and now i only have 15GB free space. Been bothering me a lot. I would appreciate some help.
I am trying to upgrade to Catalina from OS X I clicked Install, and then nothing happens. I waited a few hours and still nothing has happened. If anyone has any idea of what is happening or what I should do it would be appreciated! Try forcing a reboot and see if the install continues? Hopefully you have a backup from before starting in case you need to go back. But few other courses of action seem feasible now.
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