So the solution for Mac OS X Mavericks with Xcode 5 that doesn’t include RCS 
anymore is to download the GNU-RCS from this site:

and using Control-Click option, open and install the RCS.  Lyx version control 
works back for me. 

Best regards,

On Nov 11, 2013, at 9:32, Stephan Witt <> wrote:

> Am 10.11.2013 um 20:54 schrieb Alex Liberzon <>:
>> Hi, 
>> After few failures to use RCS on Mac OS X 10.9 Mavericks, 
>> I found on the Xcode release notes 
>> Xcode/#//apple_ref/doc/uid/TP40001051-SW241
>> this statement: 
>> The CVS and RCS source control tools have been removed from Xcode 5. 11968433
> Removing CVS and RCS control from Xcode doesn't imply it's removed from LyX.
>> Does anybody know how to get those working back? 
> You have to provide the cvs and rcs executables to get it working.
> Perhaps you miss these command line tools now after going to 10.9 + Xcode 5.
>> Isn't it about time to use Git for Lyx? 
>> Does anyone know how to use Git from Lyx 
>> ( I know how to use it in the command line)
> It's supported with the upcoming LyX-2.1 release.
> Regards,
> Stephan

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