MODIS data download issues with runGdal in R

I’m trying to download some MODIS data using the following function, which errors like so:

ndvi.evi <- runGdal("MOD13Q1", collection = "006", tileH = 20, tileV = 11,
                   begin = start, end = end, SDSstring = "111000000010", 
                   job = "NDVI.EVI", outProj="asIn")


Error in runGdal("MOD13Q1", collection = "006", tileH = 20, tileV = 11,  : 
  GDAL not installed or configured, read in '?MODISoptions' for help

When I run MODISoptions() I get the following:

> MODISoptions()

STORAGE:
_______________
localArcPath : /private/var/folders/90/qjm_6mxd1wg1f971j9t5n86c0000gp/T/Rtmpa6n6oR/MODIS_ARC 
outDirPath   : /Users/u1418987/Documents 


DOWNLOAD:
_______________
MODISserverOrder : LAADS, LPDAAC 
dlmethod         : auto 
stubbornness     : high 
wait             : 0.5 
quiet            : FALSE 


PROCESSING:
_______________
GDAL           : Not available. Use 'MODIS:::checkTools('GDAL')' for more information! 
MRT            : Enabled 
pixelSize      : asIn 
outProj        : asIn 
resamplingType : NN 
dataFormat     : GTiff 
cellchunk      : 1 

However when I run MODIS:::checkTools(‘GDAL’) it seems that it can find GDAL:

> MODIS:::checkTools('GDAL')
Checking availability of GDAL:
  OK, GDAL 2.4.2 found!

I have looked at the following forum post and couldn’t get this to work either, even though I successfully followed it:

GDAL not available in MODIS R package?

> Sys.getenv("PATH")
[1] "/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/Applications/RStudio.app/Contents/MacOS/postback:/Library/Frameworks/GDAL.framework/Versions/2.4/Programs"

Any advice?

P.S. When I run MODIS:::checkTools() I get the following:

> MODIS:::checkTools()
Checking availability of MRT:
  'MRT_HOME' not set/found! MRT is NOT enabled! See: 'https://lpdaac.usgs.gov/tools/modis_reprojection_tool'
Checking availability of GDAL:
  OK, GDAL 2.4.2 found!
sh: wget: command not found