iorewatlanta.blogg.se

1. #How to reformat macbook pro catalina install#
2. #How to reformat macbook pro catalina full#
3. #How to reformat macbook pro catalina download#

I bypassed the problem visiting the internet site which provided the instructions: "How to download macOS Catalina installer without Mac App Store". It has been not so simple, since I could not download on my MacBook with Big Sur the image of OS Catalina from the Apple Store. Many Thanks to both the Senior Members for their answers.īefore reading the answers, yesterday afternoon I tried to create a bootable USB pen-drive containing the image of OS Catalina, because this seemed to me the only way to solve the downgrade problem. (Note: My English translation of the Italian original messages/titles provided by the system may non coincide with the messages provided by a machine set with English language.

Many thanks in advance for the needed help. Is it correct to say that it involves only the files changed since the date of the system snapshot without any re-install of the operating system? Last observation: the system recovery starting from a system snapshot does not present none of the messages reported above and it performs in few seconds. Just for speculation (I don’t need now to do it): what could be a procedure to downgrade the system to Catalina, without loosing data and without having a Time Machine system backup of Catalina? At present the system recovery options at my disposal seems to indicate that I can only re-install Big Sur.

#How to reformat macbook pro catalina full#

Is this new behavior normal? Why with Big Sur Apple requires the complete system recovery to be performed in two separate steps?įor reasons not important to the present discussion, I don’t have anymore a full backup of Time Machine with OS Catalina.

#How to reformat macbook pro catalina install#

If necessary, install newly macOS, then use Migration Assistant to transfer data from the backup".īecause with old versions of macOS, till to Catalina, the system recovery from a Time Machine backup included in the same step both the system re-installation and the user data recovery, I’m now a bit confused… I noticed that after having selected the option “Recovery from a Time Machine backup” and after having selected the desired backup, the following message pops up: "To transfer the data from the backup use the Migration Assistant. Choose to convert the main drive to APFS.Hi, I wanted to verify on my MacBook Pro (13 inch - 2017) how the system recovery works (Big Sur 11.1) from a Time Machine backup by restarting the MacBook in Recovery mode (CMD+R). When it gets to the work screen, run Disk Utility from the top menu bar. Choose the flash drive as the startup volume. Once done, restart the Mac and immediately hold down the Option key. It will take a while for Catalina to be written to the flash drive as a bootable installer. Press Enter when the command is complete. It will be added to the command with whatever name you give the flash drive. Drag and drop the mounted USB drive on the desktop into Terminal. You can copy/paste the command into Terminal up to the -volume /Volumes/ part. Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume The installer itself should still be in the Applications folder. If downloading it now, when the screen comes up to choose a volume to install Catalina to, just press Command+Q to quit out of the install.