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Why do my MATLAB files appear corrupt on macOS High Sierra?

Why do my MATLAB files appear corrupt on macOS High Sierra?


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3 Answers

Answer by MathWorks Support Team on 26 Sep 2017
Edited by MathWorks Support Team on 27 Sep 2017
 Accepted Answer

Apple released macOS 10.13 High Sierra on September 25, 2017 and changed the way macOS reports Language & Region preferences to MATLAB. When you update to macOS High Sierra, we recommend you upgrade to MATLAB R2017b, which can be downloaded here.

If you cannot update MATLAB to R2017b, then please follow the instructions below to see if you are affected and how to resolve the issue.

  1. Determine if the Language your Mac is set to. You can do this by opening the “Language & Region” preference pane in System Preferences. Your current Language is at the top of the list on the left.
  2. Is your default language set to any of the following languages?
  • English
  • Chinese (Simplified)
  • Korean
  • Japanese

No: see the following Bug Report for a workaround:

Yes: you are experiencing an unknown issue. Please contact support.


What about MATLAB R2014a? I need to run this version due a university requirement. Will it work in High Sierra? Thank you.

Hi Fernando,

If you are not using one of the languages in the above list then you may be impacted. Please consult this Bug Report for a work around.

If you are unable to apply the work around, please contact support.

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Answer by RAB
on 28 Sep 2017

Does this affect the MCR / MCR based executables and libraries too?

If so:

  1. What would be the workaround?
  2. Can we expect updates/patches on the downloadable prior MCR releases?

  1 Comment


The MCR is is affected by this update, we are currently working on a possible solution to be available sometime within the week.

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Answer by Sandor Toth on 27 Sep 2017

Same problem as last year with macOS 10.12. :/


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MacOS (OSX) release dates:

10.13 - Sept 25

10.12 - Sept 20

10.11 - Sept 30

I posted a more complete list of the release dates and beta periods at .

Apple does not have a fixed release schedule. Even when they announce a MacOS version at a WWDC, they beta it until it is "good enough" and then hold a press conference announcing it will be publicly released about 10 days later. They do appear to have officially switched to a yearly release, but the dates have been semi-regular for at most the last 3 releases.

By the way, Apple already had to release a major security patch for High Sierra, which hints that their release cycle is too tight; that will likely change.

Apple OS dev cycle has been fixed for years, and is very unlikely to change, plus or minus a few weeks, whatever you may think of their internal quality control. On that point, the Mathworks have little to brag about, and could spend some useful time reflecting on their own 6-month cycle. At least Apple does not charge you for bug correction.

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