Coool Posted August 22, 2021 Share Posted August 22, 2021 Hi! Trying to upgrade C602 Build macOS Sierra 10.12.6 (16G2136) to macOS High Sierra 10.3 (17A365). Having problem "You may not install to this volume because it is part of a AppleRAID." Does somebody had such problem? Thanks. Link to comment Share on other sites More sharing options...
Coool Posted August 22, 2021 Author Share Posted August 22, 2021 It's not option. Don't want to migrate. Does somebody tried startosinstall option with success? Tried to install official macOS High Sierra 10.13.6 (17G66) form MAS and get "You may not install to this volume because the computer is missing a firmware partition." Link to comment Share on other sites More sharing options...
Administrators Hervé Posted August 23, 2021 Administrators Share Posted August 23, 2021 Coming from Sierra (or earlier), many of us initially experimented or started with High Sierra in legacy HFS+ mode given that APFS was new and did not work extremely well on mechanical HDDs. However, as time passed and more users ran on SSDs, the installation in APFS mode gradually generalised. But rest assured that opting for no conversion works well and you can safely go for that. Subsequent macOS versions no longer offer this and APFS is sole standard mode. Running Mojave and later on HFS partitions requires tricks that are best avoided imo. Link to comment Share on other sites More sharing options...
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