![]() Then its a pain because there is extremely little time to vet and prepare for inclusion of the new OS. Generally speaking this isn't too big a deal, except in cases lille this when a new OS releases simultaneously with new hardware. Going backwards even one point release or, heck even to a standard release of that same build version, has become a non option. Now, the only thing that will boot any Mac is the OS and build it ships with and higher. Used to be that there was a reasonable expectation that a retail copy of OS X on DVD (remember those? :) ) would boot most recent hardware. Part of that is because of additions to OS X that make it far easier for Apple to justify this practice, such as Recovery HD and Internet Recovery options. But yeah, for a number of years now its been the way it currently is. If not a full version back then at least with the previous point release. Given I go back to pre OS X days managing Macs, I can recall a time in the early OS X days when new hardware often worked with the previous version of OS X. If you want to have both systems, because of your legacy software, then that will be something that you will have to deal with.- I guess it depends on what you mean by "for a while now" If one is a recent addition to the world of managing Apple's devices, then its true that its been this way, possibly from the beginning based on that perspective. There would be workarounds to get that to work, too. I think you will also realize that you will perhaps struggle when choosing to boot from one system, then the other on the same drive. You will want to decide how much drive space you want for each system. Once the drive is erased (and you have reverted back to a Mac OS Extended format), then you will be able to install Sierra - followed up with reinstalling Monterey. If you still need to erase the internal drive (and you do need to erase that drive to do what you want with a Sierra system!), then you have to erase the drive with a system newer than Sierra. Someone found the solution to my problem, so I'm posting here in case it might help someone:īoot to a High Sierra installer, and the internal drive will be now visible, and you can erase, or do anything else that you need to do with the internal drive. I just want to get rid of Monterey and get my old Sierra back. I posted to and received only copy-pasted suggestions that I've already tried.)Ĭlearly there is something fundamentally incompatible between the APFS file system and HFS that's preventing cross-pollination. (I've been using Macs since 1986 and am very comfortable trouble-shooting. I have read a dozen articles that seem somewhat related, but haven't found one that directly addresses my issue including and and Īnd only turned to this forum in desperation.I wanted to do this but when I go to Disk Utility on the old laptop and choose "New Image" - the "Macintosh HD" option is grayed-out. ![]() ![]() The one thing I can think of that I have NOT yet tried is to create a new recovery flash drive apart from the Time Machine backup/boot and the dedicated boot drives that I have. ![]() Or when I choose "Restore" to the new partition, I get the error, "Source volume format on device is not valid for restoring" EG, "Error 13" which appears to be some kind of Unix code. This generates error messages that appear to be some kind of incompatibility between Sierra and Monterey. I have tried within Monterey, partitioning the new SSD, creating a HFS partition in order to install Sierra on that. In all of the above, have tried "Restore", "Install New OS", and "Disk Utility" in these attempts, the SSD drive doesn't appear as an option. I've tried everything, including creating a HFS partition on the SSD, but when I try to run disk utility from the external drive, it doesn't even see the SSD.īooted from Sierra Time Machine backup external drive.īooted from a dedicated external Sierra boot drive. I have a Time Machine / bootable external HD but can't work out how to erase the new SSD and put Sierra on it. I bought a refurbished 2015 MacBook so that I could continue using my legacy software, but its SSD came preinstalled with OS 10.14 Monterey.
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