Rcmdr not installing on mac !!

Hi! when i try to install Rcmdr package on Mac this error message appears. How can i fix it??

library(Rcmdr)
Carico il pacchetto richiesto: splines
Carico il pacchetto richiesto: RcmdrMisc
Carico il pacchetto richiesto: car
Carico il pacchetto richiesto: carData
Carico il pacchetto richiesto: sandwich
Carico il pacchetto richiesto: effects
Registered S3 methods overwritten by 'lme4':
method from
cooks.distance.influence.merMod car
influence.merMod car
dfbeta.influence.merMod car
dfbetas.influence.merMod car
lattice theme set by effectsTheme()
See ?effectsTheme for details.
Errore: package or namespace load failed for ‘Rcmdr’:
.onLoad failed in loadNamespace() for 'Rcmdr', details:
call: structure(.External(.C_dotTclObjv, objv), class = "tclObj")
error: [tcl] invalid command name "tk_messageBox".
Inoltre: Warning message:
In fun(libname, pkgname) : couldn't connect to display ":0"

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