OS-X uses a different end of line character in text files than Windows
or OS-9. Because of this the input line command in Excel VB gets the
entire file rather than one line at a time. Is there a solution for
this?

There are a few easy solutions to this. Here is one. 

1) Read in entire file as you are doing to one variable

2) Use the "split" function to convert the string to an array. I
believe the EOL marker in OS-X is chr(13); therefore your command will
look something like

myArray = split(myFile, chr(13))

3) loop through the array, each item being a line. i.e.

for i = 0 to ubound(myArray)
process(myArray(i))
next

When trying this approach I get the message compile error "Can't
assign to array". My code looks like:

dim myarray(1 to 3000) as string
dim myfile as string
open "file.txt" for input as #1
input line #1, myfile
myarray = split(myfile,chr(13))
...
...
Any additional suggestions?

Thanks,

I see how it works now. You can't specify the array limit.