Can't Update to the macOS 15.4 RC? Here's Why
Some Mac users who have an M4 MacBook Air or M4 Max/M3 Ultra Mac Studio are unable to update to the latest macOS 15.4 beta that came out today, according to complaints on Reddit.
Multiple people have reported that attempting to download and install the macOS 15.4 release candidate results in an error message. "macOS could not be downloaded. Make sure you're connected to the internet and try again, or contact Apple support for assistance," reads the error.
It turns out that Apple failed to provide the appropriate decryption key for the M4 MacBook Air and Mac Studio models to install the update. Apple encrypts its software updates and a server-side decryption key is required for installation. The key for new Macs is not available from Apple's software server at this time.
If you have one of the new Macs that's running the software that it came with when it arrived, you won't be able to update to the macOS Sequoia 15.4 release candidate until Apple fixes the issue.
This problem will not affect new MacBook Air and Mac Studio models that were previously running macOS 15.4 beta 4, as these machines can install the release candidate.
Popular Stories
Apple and Klarna are partnering on a new "Apple Upgrade" leasing program set to launch in the U.S. on Tuesday, July 28, according to Bloomberg's Mark Gurman.
The program will allow you to finance most iPhone, iPad, Mac, and Apple Watch models, with a 24-month term for iPhones and Apple Watches and a 36-month term for iPads and Macs. Customers will be able to pay off the device early during...
It is now mid-July, and that means the iPhone 18 Pro and iPhone 18 Pro Max are now just two months away. The devices are expected to look similar to the iPhone 17 Pro and iPhone 17 Pro Max, but there will still be many year-over-year changes, with rumored features including a smaller Dynamic Island, 5G via satellite, and more.
Apple is expected to unveil the iPhone 18 Pro, iPhone 18 Pro Max, ...
It is now mid-July, and that means the iPhone 18 Pro and iPhone 18 Pro Max are now just two months away. The devices are expected to look similar to the iPhone 17 Pro and iPhone 17 Pro Max, but there will still be many year-over-year changes, with rumored features including a smaller Dynamic Island, 5G via satellite, and more.
Apple is expected to unveil the iPhone 18 Pro, iPhone 18 Pro Max, ...
