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Apple fixes USB 2.0 bug in macOS Catalina

macOS Catalina
macOS Catalina (Image credit: iMore)

What you need to know

  • Apple has fixed a USB 2.0 in macOS Catalina.
  • Version 10.15.6 resolves the issue, which caused devices to disconnect.
  • It doesn't look like Big Sur has received the same treatment.

Apple's latest macOS Catalina update seems to have fixed a USB 2.0 bug that was causing peripherals to disconnect intermittently.

As reported by AppleInsider:

The new macOS Catalina 10.15.6 update has successfully addressed an intermittent bug that meant 2020 MacBook Air and MacBook Pro models would randomly disconnect USB 2.0 accessories.The Catalina update "(resolves) an issue where certain USB mouse and trackpads may lose connection," says Apple, in its release notes. As is typical for a brief release note, there are no further details about the fix.

As mentioned, there is no detail beyond Apple having resolved the issue. As AI notes, the problem still persists in the beta of macOS Big Sur. The problem, reported back in June seems to be causing USB 2.0 accessories to randomly disconnect or stop working, in particular when connected to a USB hub. From the original story:

Apple's 2020 MacBook lineup seems to be having issues with USB 2.0 when used with adapters or hubs.As reported by MacRumors:MacBook Air and MacBook Pro owners who have one of the new 13-inch 2020 models released earlier this year appear to be experiencing problems with USB 2.0 accessories that connect to their machines through a hub or adapter. There are a number of complaints about the issue on the MacRumors forums, Reddit, and the Apple Support Communities. Affected customers appear to be seeing devices connected to the Mac randomly disconnect

macOS 10.15.6 also brought with it big changes to Apple News, adding local news feeds for San Francisco, the Bay Area, LA, Houston, and New York City.

Stephen Warwick
News Editor

Stephen Warwick has written about Apple for five years at iMore and previously elsewhere. He covers all of iMore's latest breaking news regarding all of Apple's products and services, both hardware and software. Stephen has interviewed industry experts in a range of fields including finance, litigation, security, and more. He also specializes in curating and reviewing audio hardware and has experience beyond journalism in sound engineering, production, and design.

Before becoming a writer Stephen studied Ancient History at University and also worked at Apple for more than two years. Stephen is also a host on the iMore show, a weekly podcast recorded live that discusses the latest in breaking Apple news, as well as featuring fun trivia about all things Apple.