Use this awk script to adjust standard GPX files downloaded from any site (bikes) into a GPX format that is supported by Xcode.

adjust_gpx_to_apple_format.awk

awk '
BEGIN {
    buffer=""
}
{
    gsub(/<\/*trk>/,"",$0)
    gsub(/<\/*trkseg>/,"",$0)
    gsub(/<trkpt/,"<wpt", $0)
    gsub(/<\/trkpt>/,"<\/wpt>", $0)
    print
}
/<wpt/,/<\/wpt>/ {
    buffer=buffer $0
    if ($0 !~ "<\/wpt>") {
        buffer=buffer "\n"
    }
}
/<\/wpt>/ {
    #print buffer
    buffer=""
}

END {
}' $1

I am not sure how to process the file from bikehike with this script. Can you help. I tried with terminal in Mac but no luck.

OK, I tried: "awk -f script.awk bikehike_course > output.gpx", but got this error:

Error: awk: syntax error at source line 1 source file adjust_gpx_to_apple_format.awk context is awk >>> ' <<< awk: bailing out at source line 24

awk 
BEGIN {
    buffer=""
}
{
    gsub(/<\/*trk>/,"",$0)
    gsub(/<\/*trkseg>/,"",$0)
    gsub(/<trkpt/,"<wpt", $0)
    gsub(/<\/trkpt>/,"<\/wpt>", $0)
    print
}
/<wpt/,/<\/wpt>/ {
    buffer=buffer $0
    if ($0 !~ "<\/wpt>") {
        buffer=buffer "\n"
    }
}
/<\/wpt>/ {
    #print buffer
    buffer=""
}

END {
} $1

this one working fine just remove some codes :) (crazy only single quotes 👍 ).

All the buffer calculation is not needed.

The same effect can be achieved by editing the original file and printing the result (which is what the script is already doing, but by using print is printing twice the same things)

awk
{
    gsub(/<\/*trk>/,"",$0)
    gsub(/<\/*trkseg>/,"",$0)
    gsub(/<trkpt/,"<wpt", $0)
    gsub(/<\/trkpt>/,"<\/wpt>", $0)
}
END {}
$1