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  1. #1
    Operating with TWO OS systems
    Is there a way to have two partitions on my Mac, one with El Capitan and one with the latest OS? Reason is that I have Adobe's CS 6 which may not be compatible on later operating systems
    Also, would need the ability to drag stuff back and forth like photos and files. The only thing El Capitan would do is operate the Adobe product.

    Searay
    Iphone 6+
    OS El Capitan

  2. #2
    Operating with TWO OS systems
    Raz0rEdge's Avatar
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    Yes, it can be done and is done by people who want to play with a beta version of a new OS for example. Follow these instructions to set it up. Make sure you have a valid & verified backup before starting this process.
    --
    Regards
    ...Ashwin


  3. #3
    Quick question: Would I make the partition just big enough to hold the downgraded OS and the software that would run on it?

  4. #4
    Operating with TWO OS systems
    Slydude's Avatar
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    For any OS version released in the last decade, or maybe longer, you're going to want to leave some blank space on each parttion. The OS will use that soace to write data that can't be held in memory as memory fills up.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  5. #5
    Operating with TWO OS systems
    Raz0rEdge's Avatar
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    Whatever principals apply when you are operating a single OS applies in this dual-boot scenario. One of the key ones is leaving at leas 20% of the disk free for the OS to be happy. So ensure that your partitions are large enough to support that.
    --
    Regards
    ...Ashwin


  6. #6
    Question:

    After partitioning, I want to run only my Adobe products on the older version.... assume I load them into the partition with the older OS?

    And once done, can I have both OSs operating seemless, so I can create something in Adobe, and pull that file into the other OS to use on another software. Eg would be to create a picture in Adobe, and use it in Word or Excel on the other operating system.

    Thx
    Searay

  7. #7
    Operating with TWO OS systems
    Slydude's Avatar
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    You can indeed create the file using a program on one partition and full the file into a program on the second partition if you choose a file format that both programs support. Each time you want to switch to a different OS you have to reboot the Mac.

    If I am understanding what you want to do correctly you could install the second program and the software that you want to run in a virtual machine. Done that way you do not have to reboot the Mac just to run the program that you want to run.

    Edit: The disadvantage of running a virtual machine is that some programs do not run very well in those circumstances -- especially if the program is very graphics or CPU intensive.

    If you can give us your Mac specs and which program you want to run perhaps we can give you an idea of the best way to do what you want.
    Last edited by Slydude; 06-27-2019 at 09:34 AM. Reason: Added additional information.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  8. #8
    Quote Originally Posted by Slydude View Post
    You can indeed create the file using a program on one partition and full the file into a program on the second partition if you choose a file format that both programs support. Each time you want to switch to a different OS you have to reboot the Mac.

    If I am understanding what you want to do correctly you could install the second program and the software that you want to run in a virtual machine. Done that way you do not have to reboot the Mac just to run the program that you want to run.

    Edit: The disadvantage of running a virtual machine is that some programs do not run very well in those circumstances -- especially if the program is very graphics or CPU intensive.

    If you can give us your Mac specs and which program you want to run perhaps we can give you an idea of the best way to do what you want.
    Slydude,

    Thx
    I have Adobe Creative Suite CS6, which works well on older OSs, but not so well on the current ones and use it a fair amount, but no longer professionally like I used to. Adobe has raised their prices brutally and only offers a subscription. You can't just purchase the software and upgrade it occasionally. The monthly costs are just out of sight for a weekend designer. So, upgrading is not much of an option, so I'd like to explore two operating systems, but need to go back and forth between them. Rebooting each time wont work.

    Thx

  9. #9
    Operating with TWO OS systems
    rachalmers's Avatar
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    Quote Originally Posted by SeaRay View Post
    Is there a way to have two partitions on my Mac, one with El Capitan and one with the latest OS? Reason is that I have Adobe's CS 6 which may not be compatible on later operating systems
    Also, would need the ability to drag stuff back and forth like photos and files. The only thing El Capitan would do is operate the Adobe product.

    Searay
    Iphone 6+
    OS El Capitan
    In short, no.



    Sent from my iPad using Mac-Forums

  10. #10
    Operating with TWO OS systems
    Slydude's Avatar
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    @SeaRay I can certainly understand your situation. If this is something that you do quite a bit rebooting so often would quickly become very annoying. At least it would for me. I'm not always a patient person.

    There are a few options for virtual machines. Some of them are free and others paid.

    @rachalmers Can you clarify your response a bit? I'm confused.
    Last edited by Slydude; 06-27-2019 at 11:50 AM.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  11. #11
    Operating with TWO OS systems
    MacInWin's Avatar
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    I can verify that Parallels will install Mojave as a guest (from the host machine's Recovery Partition). You can then install PS in that virtual machine. You will probably have to unregister it from the current installation and re-register it in the new as Adobe is pretty restrictive about that sort of thing. Definitely cannot have two copies, one the host, one the guest, unless you have two licences. The beauty of using Parallels is that you can then move files from the guest to the host on the fly (drag and drop), which is what you say you need to do. Parallels isn't free, but it's not fiercely expensive, either. I cannot speak to the speed or quality of PS in the guest Mojave system, but I do have a copy of CS6 in a Windows guest under Parallels that works very well.
    Jake

  12. #12
    Operating with TWO OS systems
    rachalmers's Avatar
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    Quote Originally Posted by Slydude View Post
    @SeaRay I can certainly understand your situation. If this is something that you do quite a bit rebooting so often would quickly become very annoying. At least it would for me. I'm not always a patient person.

    There are a few options for virtual machines. Some of them are free and others paid.

    @rachalmers Can you clarify your response a bit? I'm confused.
    I understand that you are wanting to have two operating systems on one machine. Operating at the same time.
    This is literally not possible.

    You can boot either one or the other. Store files on an external drive. Boot the other os and retrieve the external files.

    You may or may not be able to partition a Mac so that you can have two options to boot from. You can do it with a windows virtual os and the Mac. Only someone who’s done it could tell you.
    It seems like a lot of trouble for such a small problem?



    Sent from my iPad using Mac-Forums

  13. #13
    Operating with TWO OS systems
    pigoo3's Avatar
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    Quote Originally Posted by SeaRay View Post
    Is there a way to have two partitions on my Mac, one with El Capitan and one with the latest OS?
    If this question was asked as little as 1 year ago (or less)...I would have said a definite yes. I happen to have a hard drive with 5 partitions...with a different macOS version installed on each partition.

    What has changed within the last year or less you may ask??...Apple's newest storage device format called APFS. Before this..."Mac OS Extended (Journaled)" was pretty much the default storage device format most MacUsers used (from 1998 until now)...21 years!!!

    APFS has it's advantages...but one downside to APFS is backward compatibility. Storage devices running macOS version's older than macOS Sierra (10.12) cannot read or write to an APFS formatted drive. Thus an older macOS (like El Capitan, 10.11) cannot read/write to an APFS formatted drive.

    Thus the answer is...officially according to Apple...a hard drive split into two partitions cannot run both El Capitan & Mojave (since this hard drive would be formatted with APFS...which El Captain can't work with).

    But unofficially...I have seen that there is some sort of "Mojave Patcher" out there that somehow allows Mojave to be installed on storage devices formatted as Mac OS Extended (Journaled)...and there can be some performance issues with this patcher setup.

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  14. #14
    Operating with TWO OS systems
    MacInWin's Avatar
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    I understand that you are wanting to have two operating systems on one machine. Operating at the same time.
    This is literally not possible.
    Technically, maybe, but practically, it's totally possible. Using a virtual system (Parallels, VMWare, etc) you can run an OS as an application on the booted machine, in effect having two or more running OSes at a time. I have had as many as four operating simultaneously (MacOS on the hardware, Windows7 as a virtual machine along with Ubuntu and a second instance of Mojave). It was ugly-slow with all four up and going, but ran.
    Jake

  15. #15
    Operating with TWO OS systems
    MacInWin's Avatar
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    Nick, I think one could have two partitions on the hardware, one formatted for HFS+ and the other for APFS. So technically, you could still do what you said. However, older versions of the OS (Pre-High Sierra) cannot read APFS. But you can do a hardware partition still and have two distinct formats in the partitions and two distinct operating systems. Once in APFS, then the "partitions" there are really containers, of course.

    That is, of course, how Bootcamp works. The Widows partition is formatted NTFS, the Mac partition is APFS.
    Jake

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