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Update: The Mac Studio requires an IPSW restore after changing its SSD modules to ensure that they are readable and able to boot. Running a Device Firmware Update (DFU) restore using the macOS IPSW package for the Mac Studio should enable the machine to boot from a different SSD, providing that both of the modules are of the same size and make, meaning that storage upgrades still appear to be feasible.

Despite being easily removable since it is not soldered down, the Mac Studio's SSD storage is not currently user-upgradeable due to a software block, YouTuber Luke Miani has discovered.

mac-studio-ssd.jpg
Image via Max Tech

Initial teardowns suggested that the Mac Studio's storage could be upgradeable since it is not soldered in place. Each Mac Studio contains two internal SSD slots, and the SSDs themselves can be freely swapped between the connectors.

In a video on his YouTube channel, Miani tested if the Mac Studio's storage is user upgradeable in practice. Miani wiped the SSD of a Mac Studio, removed it from the machine, and inserted it into an empty SSD slot in another Mac Studio, but the Mac's status light blinked SOS and would not boot.

The Mac Studio recognizes the SSD, but Apple's software prevents it from booting, suggesting that this is a conscious decision by Apple to prevent users from upgrading their storage themselves. On its website, Apple claims that the Mac Studio's SSD storage is "not user accessible" and encourages users to configure the device with enough storage at the point of purchase.

It now seems that the purpose of the easily replaceable storage is to aid repairs performed by authorized technicians, who likely will have software tools that enable the Mac Studio to boot from different internal storage. Since the prevention of user-upgradeability appears to simply be due to a software block, Apple could enable users to upgrade their own storage in the future via an update.

It was originally impossible for users to manually upgrade the storage of the Mac Pro, but Apple went on to offer a kit to upgrade the Mac Pro's storage in mid-2020, so a similar move for the Mac Studio is not out of the question, particularly given the announcement of Apple's Self Service Repair Program.

Article Link: Mac Studio Storage Not User-Upgradeable Due to Software Block [Updated]
 
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One would expect there will be a legit upgrade path in the future, like with the 2019 Mac Pro. Or some enterprising person will be able to solve the problem.
 
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This sounds like he may have wiped the efi partition. Try installing macOS on the new ssd, verify that it boots externally, and then install it.
In fact the real test here would have been to swap the drives without wiping them. You can’t just put a blank drive in a Mac and expect it to boot. It won’t. The boot loader is actually stored on the drive.
 
Obviously I would prefer more modularity in Apple computers, but we knew day one that the Mac Studio SSD would not be upgradeable. This is a known limitation and there’s no reason we should expect otherwise

It’s the fact that Apple went for a “modular” connector for their own assembly and cost efficiency but didn’t want to pass that advantage to the consumer.
 
One would expect there will be a legit upgrade path in the future, like with the 2019 Mac Pro. Or some enterprising person will be able to solve the problem.

If someone else figures out how to do this, the first thing Apple will do is software block that method ?
 
It’s the fact that Apple went for a “modular” connector for their own assembly and cost efficiency but didn’t want to pass that advantage to the consumer.

Yeah...usually Apple isn't this out and out skeevy and a little more elegant in how they do these things. This seems an unusually brutishly & unsophisticated way to squeeze more money out of very high paying customers.
 
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