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Here is a version that passes Directory[] to df so you know how much space there is in Mathematicas current working directory.

I have tried it on linux but I see no reason it shouldn't work on OSX and other unixy systems that have df.

Options[freeSpace] = {"Path" :> Directory[], "Property" -> 4};
freeSpace[OptionsPattern[]] := 
 Module[{out = 
    ReadList["!df '" <> ToString[OptionValue["Path"]] <> "'"
     ,Word 
     ,RecordLists -> True]
    ,i ,val},
  val = out[[-1, OptionValue["Property"]]];
  Quiet[Check[
    FromDigits[val],
    val, FromDigits::nlst
    ], FromDigits::nlst]
  ]

You can do similarly with @WReach's solution, which would be better since it will work on all systems.

JavaBlock[JavaNew["java.io.File", Directory[]]@getFreeSpace[]]

You can also check how much free space is on another disk, say you store your stuff elsewhere:

freeSpace[]                 (* 8898584 *)
freeSpace["Path"-> "/tmp"]  (* 20958736 *)

You can also extract other information that df gives:

freeSpace["Path" -> "/tmp", "Property" -> 1] (* "/dev/sda5" *)

The different properties are:

    1            2     3     4    5     6
Filesystem      Size  Used Avail Use% Mounted on

Here is a version that passes Directory[] to df so you know how much space there is in Mathematica's current working directory.

I have tried it on Linux but I see no reason it shouldn't work on OSX and other unixy systems that have df.

Options[freeSpace] = {"Path" :> Directory[], "Property" -> 4};
freeSpace[OptionsPattern[]] := 
 Module[{out = 
    ReadList["!df '" <> ToString[OptionValue["Path"]] <> "'"
     ,Word 
     ,RecordLists -> True]
    ,i ,val},
  val = out[[-1, OptionValue["Property"]]];
  Quiet[Check[
    FromDigits[val],
    val, FromDigits::nlst
    ], FromDigits::nlst]
  ]

You can do similarly with @WReach's solution, which would be better since it will work on all systems.

JavaBlock[JavaNew["java.io.File", Directory[]]@getFreeSpace[]]

You can also check how much free space is on another disk, say you store your stuff elsewhere:

freeSpace[]                 (* 8898584 *)
freeSpace["Path"-> "/tmp"]  (* 20958736 *)

You can also extract other information that df gives:

freeSpace["Path" -> "/tmp", "Property" -> 1] (* "/dev/sda5" *)

The different properties are:

    1            2     3     4    5     6
Filesystem      Size  Used Avail Use% Mounted on

Here is a version that passes Directory[] to df so you know how much space there is in Mathematicas current working directory.

I have tried it on linux but I see no reason it shouldn't work on OSX and other unixy systems that have df.

Options[freeSpace] = {"Path" :> Directory[], "Property" -> 4};
freeSpace[OptionsPattern[]] := 
 Module[{out = 
    ReadList["!df '" <> ToString[OptionValue["Path"]] <> "'"
     ,Word 
     ,RecordLists -> True]
    ,i ,val},
  val = out[[-1, OptionValue["Property"]]];
  Quiet[Check[
    FromDigits[val],
    val, FromDigits::nlst
    ], FromDigits::nlst]
  ]

You can also check how much free space is on another disk, say you store your stuff elsewhere:

freeSpace[]                 (* 8898584 *)
freeSpace["Path"-> "/tmp"]  (* 20958736 *)

You can also extract other information that df gives:

freeSpace["Path" -> "/tmp", "Property" -> 1] (* "/dev/sda5" *)

The different properties are:

    1            2     3     4    5     6
Filesystem      Size  Used Avail Use% Mounted on

Here is a version that passes Directory[] to df so you know how much space there is in Mathematicas current working directory.

I have tried it on linux but I see no reason it shouldn't work on OSX and other unixy systems that have df.

Options[freeSpace] = {"Path" :> Directory[], "Property" -> 4};
freeSpace[OptionsPattern[]] := 
 Module[{out = 
    ReadList["!df '" <> ToString[OptionValue["Path"]] <> "'"
     ,Word 
     ,RecordLists -> True]
    ,i ,val},
  val = out[[-1, OptionValue["Property"]]];
  Quiet[Check[
    FromDigits[val],
    val, FromDigits::nlst
    ], FromDigits::nlst]
  ]

You can do similarly with @WReach's solution, which would be better since it will work on all systems.

JavaBlock[JavaNew["java.io.File", Directory[]]@getFreeSpace[]]

You can also check how much free space is on another disk, say you store your stuff elsewhere:

freeSpace[]                 (* 8898584 *)
freeSpace["Path"-> "/tmp"]  (* 20958736 *)

You can also extract other information that df gives:

freeSpace["Path" -> "/tmp", "Property" -> 1] (* "/dev/sda5" *)

The different properties are:

    1            2     3     4    5     6
Filesystem      Size  Used Avail Use% Mounted on

Here is a version that passes Directory[] to df so you know how much space there is in Mathematicas current working directory.

I have tried it on linux but I see no reason it shouldn't work on OSX and other unixy systems that have df.

Options[freeSpace] = {"Path" :> Directory[], "Property" -> 4};
freeSpace[OptionsPattern[]] := 
 Module[{out = 
    ReadList["!df '" <> ToString[OptionValue["Path"]] <> "'"
     ,Word 
     ,RecordLists -> True]
    ,i ,val},
  val = out[[-1, OptionValue["Property"]]];
  Quiet[Check[
    FromDigits[val],
    val, FromDigits::nlst
    ], FromDigits::nlst]
  ]

You can also check how much free space is on another disk, say you store your stuff elsewhere:

freeSpace[]                 (* 8898584 *)
freeSpace["Path"-> "/tmp"]  (* 20958736 *)

You can also extract other information that df gives:

freeSpace["Path" -> "/tmp", Property -> 1] (* "/dev/sda5" *)

The different properties are:

    1            2     3     4    5     6
Filesystem      Size  Used Avail Use% Mounted on

Here is a version that passes Directory[] to df so you know how much space there is in Mathematicas current working directory.

I have tried it on linux but I see no reason it shouldn't work on OSX and other unixy systems that have df.

Options[freeSpace] = {"Path" :> Directory[], "Property" -> 4};
freeSpace[OptionsPattern[]] := 
 Module[{out = 
    ReadList["!df '" <> ToString[OptionValue["Path"]] <> "'"
     ,Word 
     ,RecordLists -> True]
    ,i ,val},
  val = out[[-1, OptionValue["Property"]]];
  Quiet[Check[
    FromDigits[val],
    val, FromDigits::nlst
    ], FromDigits::nlst]
  ]

You can also check how much free space is on another disk, say you store your stuff elsewhere:

freeSpace[]                 (* 8898584 *)
freeSpace["Path"-> "/tmp"]  (* 20958736 *)

You can also extract other information that df gives:

freeSpace["Path" -> "/tmp", "Property" -> 1] (* "/dev/sda5" *)

The different properties are:

    1            2     3     4    5     6
Filesystem      Size  Used Avail Use% Mounted on