Dual boot macOS Catalina 10.15 and macOS Mojave 10.14
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Dual boot macOS Catalina 10.15 and macOS Mojave 10.14
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I wish to keep my fully working MacBook Pro using 10.14 but I want to install 10.15 beta on another drive so I can choose which OS to use at a given time.
I've installed the profile from https://developer.apple.com/download/.
Now the Software Update section of Settings lets me update to macOS Catalina 10.15. But before completing a 6 GB download, is this going to give me the option to install 10.15 beta on a separate partition or is this going to blindly update my existing 10.14 installation?
macos software-update beta catalina
edited 7 hours ago
Nimesh Neema
19.9k85084
asked 8 hours ago
rmaddyrmaddy
27117
add a comment |
I wish to keep my fully working MacBook Pro using 10.14 but I want to install 10.15 beta on another drive so I can choose which OS to use at a given time.
I've installed the profile from https://developer.apple.com/download/.
Now the Software Update section of Settings lets me update to macOS Catalina 10.15. But before completing a 6 GB download, is this going to give me the option to install 10.15 beta on a separate partition or is this going to blindly update my existing 10.14 installation?
macos software-update beta catalina
edited 7 hours ago
Nimesh Neema
19.9k85084
asked 8 hours ago
rmaddyrmaddy
27117
2
Also understand that you are running BETA software. So back up your stuff and don't be too surprised when something does not work as planned, and also this was released literally minutes before you posted this question. Any answer you get is an educated GUESS based on what macOS of the present and past has already done. So, again, back up your stuff and don't be surprised when stuff don't work and takes your work and/or files with it.
– Steve Chambers
7 hours ago
add a comment |
I wish to keep my fully working MacBook Pro using 10.14 but I want to install 10.15 beta on another drive so I can choose which OS to use at a given time.
I've installed the profile from https://developer.apple.com/download/.
Now the Software Update section of Settings lets me update to macOS Catalina 10.15. But before completing a 6 GB download, is this going to give me the option to install 10.15 beta on a separate partition or is this going to blindly update my existing 10.14 installation?
macos software-update beta catalina
edited 7 hours ago
Nimesh Neema
19.9k85084
asked 8 hours ago
rmaddyrmaddy
27117
I wish to keep my fully working MacBook Pro using 10.14 but I want to install 10.15 beta on another drive so I can choose which OS to use at a given time.
I've installed the profile from https://developer.apple.com/download/.
Now the Software Update section of Settings lets me update to macOS Catalina 10.15. But before completing a 6 GB download, is this going to give me the option to install 10.15 beta on a separate partition or is this going to blindly update my existing 10.14 installation?
macos software-update beta catalina
macos software-update beta catalina
edited 7 hours ago
Nimesh Neema
19.9k85084
asked 8 hours ago
rmaddyrmaddy
27117
edited 7 hours ago
Nimesh Neema
19.9k85084
asked 8 hours ago
rmaddyrmaddy
27117
edited 7 hours ago
Nimesh Neema
19.9k85084
edited 7 hours ago
Nimesh Neema
19.9k85084
edited 7 hours ago
Nimesh Neema
19.9k85084
19.9k85084
asked 8 hours ago
rmaddyrmaddy
27117
asked 8 hours ago
rmaddyrmaddy
27117
asked 8 hours ago
rmaddyrmaddy
27117
27117
2
Also understand that you are running BETA software. So back up your stuff and don't be too surprised when something does not work as planned, and also this was released literally minutes before you posted this question. Any answer you get is an educated GUESS based on what macOS of the present and past has already done. So, again, back up your stuff and don't be surprised when stuff don't work and takes your work and/or files with it.
– Steve Chambers
7 hours ago
add a comment |
2
Also understand that you are running BETA software. So back up your stuff and don't be too surprised when something does not work as planned, and also this was released literally minutes before you posted this question. Any answer you get is an educated GUESS based on what macOS of the present and past has already done. So, again, back up your stuff and don't be surprised when stuff don't work and takes your work and/or files with it.
– Steve Chambers
7 hours ago
2
2
Also understand that you are running BETA software. So back up your stuff and don't be too surprised when something does not work as planned, and also this was released literally minutes before you posted this question. Any answer you get is an educated GUESS based on what macOS of the present and past has already done. So, again, back up your stuff and don't be surprised when stuff don't work and takes your work and/or files with it.
– Steve Chambers
7 hours ago
Also understand that you are running BETA software. So back up your stuff and don't be too surprised when something does not work as planned, and also this was released literally minutes before you posted this question. Any answer you get is an educated GUESS based on what macOS of the present and past has already done. So, again, back up your stuff and don't be surprised when stuff don't work and takes your work and/or files with it.
– Steve Chambers
7 hours ago
add a comment |
2 Answers
2
active
oldest
votes
Your existing installation won't be blindly updated. The macOS Catalina installer will launch as soon as it is downloaded.
You should be able to create a bootable USB installer. Alternatively, you can plug-in an external drive, let the installer run and install macOS Catalina on it.
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
add a comment |
Good news. After the 10.15 beta download completes, the installer starts and after accepting the license, you are shown a screen where you can select where to install the OS. It defaults to the current disk containing 10.14 but there is a "Show Disks" button. Clicking it brings up a list of all other partitions attached to the computer. Many will be grayed out. The drive/partition you wish to choose must be formatted using APFS in order to be selectable as an option.
In my case I was able to install 10.15 beta to an external USB hard drive once I formatted it with APFS.
Naturally I made a full Time Machine backup and another full cloned backup to yet another external backup drive before running the beta OS. Be safe with beta OSes.
answered 6 hours ago
rmaddyrmaddy
27117
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Your existing installation won't be blindly updated. The macOS Catalina installer will launch as soon as it is downloaded.
You should be able to create a bootable USB installer. Alternatively, you can plug-in an external drive, let the installer run and install macOS Catalina on it.
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
add a comment |
Your existing installation won't be blindly updated. The macOS Catalina installer will launch as soon as it is downloaded.
You should be able to create a bootable USB installer. Alternatively, you can plug-in an external drive, let the installer run and install macOS Catalina on it.
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
add a comment |
Your existing installation won't be blindly updated. The macOS Catalina installer will launch as soon as it is downloaded.
You should be able to create a bootable USB installer. Alternatively, you can plug-in an external drive, let the installer run and install macOS Catalina on it.
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
Your existing installation won't be blindly updated. The macOS Catalina installer will launch as soon as it is downloaded.
You should be able to create a bootable USB installer. Alternatively, you can plug-in an external drive, let the installer run and install macOS Catalina on it.
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
edited 6 hours ago
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
answered 8 hours ago
Nimesh NeemaNimesh Neema
19.9k85084
19.9k85084
add a comment |
add a comment |
Good news. After the 10.15 beta download completes, the installer starts and after accepting the license, you are shown a screen where you can select where to install the OS. It defaults to the current disk containing 10.14 but there is a "Show Disks" button. Clicking it brings up a list of all other partitions attached to the computer. Many will be grayed out. The drive/partition you wish to choose must be formatted using APFS in order to be selectable as an option.
In my case I was able to install 10.15 beta to an external USB hard drive once I formatted it with APFS.
Naturally I made a full Time Machine backup and another full cloned backup to yet another external backup drive before running the beta OS. Be safe with beta OSes.
answered 6 hours ago
rmaddyrmaddy
27117
add a comment |
Good news. After the 10.15 beta download completes, the installer starts and after accepting the license, you are shown a screen where you can select where to install the OS. It defaults to the current disk containing 10.14 but there is a "Show Disks" button. Clicking it brings up a list of all other partitions attached to the computer. Many will be grayed out. The drive/partition you wish to choose must be formatted using APFS in order to be selectable as an option.
In my case I was able to install 10.15 beta to an external USB hard drive once I formatted it with APFS.
Naturally I made a full Time Machine backup and another full cloned backup to yet another external backup drive before running the beta OS. Be safe with beta OSes.
answered 6 hours ago
rmaddyrmaddy
27117
add a comment |
Good news. After the 10.15 beta download completes, the installer starts and after accepting the license, you are shown a screen where you can select where to install the OS. It defaults to the current disk containing 10.14 but there is a "Show Disks" button. Clicking it brings up a list of all other partitions attached to the computer. Many will be grayed out. The drive/partition you wish to choose must be formatted using APFS in order to be selectable as an option.
In my case I was able to install 10.15 beta to an external USB hard drive once I formatted it with APFS.
Naturally I made a full Time Machine backup and another full cloned backup to yet another external backup drive before running the beta OS. Be safe with beta OSes.
answered 6 hours ago
rmaddyrmaddy
27117
Good news. After the 10.15 beta download completes, the installer starts and after accepting the license, you are shown a screen where you can select where to install the OS. It defaults to the current disk containing 10.14 but there is a "Show Disks" button. Clicking it brings up a list of all other partitions attached to the computer. Many will be grayed out. The drive/partition you wish to choose must be formatted using APFS in order to be selectable as an option.
In my case I was able to install 10.15 beta to an external USB hard drive once I formatted it with APFS.
Naturally I made a full Time Machine backup and another full cloned backup to yet another external backup drive before running the beta OS. Be safe with beta OSes.
answered 6 hours ago
rmaddyrmaddy
27117
answered 6 hours ago
rmaddyrmaddy
27117
answered 6 hours ago
rmaddyrmaddy
27117
answered 6 hours ago
rmaddyrmaddy
27117
27117
add a comment |
add a comment |
2
Also understand that you are running BETA software. So back up your stuff and don't be too surprised when something does not work as planned, and also this was released literally minutes before you posted this question. Any answer you get is an educated GUESS based on what macOS of the present and past has already done. So, again, back up your stuff and don't be surprised when stuff don't work and takes your work and/or files with it.
– Steve Chambers
7 hours ago