Wednesday, January 29, 2020

MIP 2020

MOSEK is proud to be one of the sponsors of MIP2020 - Mixed Integer Programming Workshop 2020 feat. DANniversary, taking place May 18–21, 2020 at DIMACS, Rutgers University.

See for more details.

Tuesday, December 17, 2019

Office hours during end of year 2019

Our sales and support will be closed

24,25,26 December

as well as

31 December, 1 January.

The whole MOSEK team wishes everyone Happy Holiday and a good start into the New Year 2020.

Tuesday, December 3, 2019

macOS 10.15 (Catalina) MOSEK installation

MacOS 10.15 (Catalina) introduced stricter checks for unverified applications downloaded from the Internet. When you try to run MOSEK you may experience security exceptions such as:

"mosekopt.mexmaci64" cannot be opened because the developer cannot be verified. macOS cannot verify that this app is free from malware.


"mosek" cannot be opened because the developer cannot be verified. macOS cannot verify that this app is free from malware.


‘.../mosekopt.mexmaci64’:  dlopen(.../mosekopt.mexmaci64,6): no suitable image found. Did find:  mosekopt.mexmaci64:  code signature in (.../mosekopt.mexmaci64)  not valid for use in process using Library Validation:  library load disallowed by system policy.
or other errors of this kind.

Solution 1

Do not download the MOSEK package through a browser, use a command-line download tool such as curl instead:

curl -o mosektoolsosx64x86.tar.bz2

(replace 9.1.9 with the version you want to download). Continue with normal installation.

Solution 2

After you download the distribution remove the quarantine attribute from the downloaded file:

xattr -d mosektoolsosx64x86.tar.bz2

Administrator permissions may be necessary. Continue with normal installation.

If you already unpacked the distribution remove the attribute recursively from the whole folder with MOSEK installation

xattr -dr mosek

assuming you are in the folder which contains the unpacked mosek folder. Administrator permissions may be necessary. 

Monday, November 4, 2019

FlexLM update

In version 9.1.5 we upgraded the FlexLM license manager to from version 11.14 to 11.16 because of a potential security issue reported by a user.

This upgrade breaks client-server compatibility. That means that if you installed a MOSEK 9.1.5+ client, you are using a floating license, and you are getting an error such as

Version of vendor daemon is too old

then you should upgrade the license server to one that also comes from a 9.1.5+ distribution of MOSEK. It will be able to serve the new and all older client versions.

See also The licensing FAQ.

Tuesday, October 22, 2019

IPCO 2020

Just like this year, MOSEK is one of the sponsors of the upcoming IPCO 2020, The 21st Conference on Integer Programming and Combinatorial Optimization, taking place at LSE in London 8-10 June 2020.

Submission deadline is November 29, 2019.

Wednesday, October 2, 2019

MOSEK 9.1 and deprecation plans for version 10

Today we released MOSEK 9.1, which is a direct continuation of version 9.0 with no changes to the optimizer or the existing API.

It introduces one new feature: the possibility to use the remote OptServer from Fusion via Model.solve(server, port).

We take this opportunity to announce that the following will be dropped in the next major release:

  • support for Python 2.7 on all platforms,
  • support for Java on Windows 32bit,
  • support for all versions of Python on Windows 32bit.


Tuesday, August 20, 2019

Dropping 32bit Windows

Due to falling interest in our distribution for Windows 32bit platform and the fact that more and more software vendors are dropping it, we also plan to drop the Windows 32bit package in one of the minor or major releases in near future.

We will most likely continue to provide a minimal package consisting of the low-level C API and shared libraries.

If you rely on MOSEK for 32bit Windows please let us know at so that we can best accommodate your needs.

Of course nothing changes on 64bit Windows.