Creating partition on USB drive I have been following directions to create a bootable USB drive from here:

http://borgstrom.ca/2010/10/14/os-x-bootable-usb.html

Here is the relevant screenshot:



However for my case on the USB Drive (a new 32GB Sandisk): the Disk Utility shows the Partition tab is disabled:



Hints on whether the procedure being followed were incorrect appreciated.
Apple declines to partition many more drives on 10.11 than it did in the past. Have you tried the "erase" command to blow away everything?

If that's no good, you could try the command line:

diskutil splitpartition


The help is a bit obtuse, but if you posted what layout you wanted, perhaps someone could get you the command for OS X.


  Split a pre-existing partition into multiple partitions.  All data on the split
  partition will be lost.  The first disk parameter is the one to split; the
  remaining parameters are as in the diskutil partitionDisk command.
  Ownership of the affected disk is required.
  
  Valid sizes are floating-point numbers with a suffix of B(ytes), S(512-byte-
  blocks), K(ilobytes), M(egabytes), G(igabytes), T(erabytes), P(etabytes),
  or (%)percentage of the total size of the whole disk.


Here's a lot of output from a command to make three partitions on a 64 GB drive:

$ diskutil splitpartition disk2s2 "MS-DOS FAT12" BOOT_ARMHF 1.0M ExFAT Linux 1.9G "Journaled HFS+" OSX 2G
Started partitioning on disk2s2 Untitled
Splitting
Unmounting disk
Waiting for the disks to reappear
Formatting disk2s2 as MS-DOS (FAT12) with name BOOT_ARMHF
512 bytes per physical sector
/dev/rdisk2s2: 1907 sectors in 1907 FAT12 clusters (512 bytes/cluster)
bps=512 spc=1 res=1 nft=2 rde=512 sec=1952 mid=0xf8 spf=6 spt=32 hds=16 hid=409640 drv=0x80
Mounting disk
Formatting disk2s3 as ExFAT with name Linux
Volume name      : Linux
Partition offset : 411648 sectors (210763776 bytes)
Volume size      : 3708928 sectors (1898971136 bytes)
Bytes per sector : 512
Bytes per cluster: 131072
FAT offset       : 16384 sectors (8388608 bytes)
# FAT sectors    : 16384
Number of FATs   : 1
Cluster offset   : 32768 sectors (16777216 bytes)
# Clusters       : 14360
Volume Serial #  : 56c61e6c
Bitmap start     : 2
Bitmap file size : 1795
Upcase start     : 3
Upcase file size : 5836
Root start       : 4
Mounting disk
Formatting disk2s4 as Mac OS Extended (Journaled) with name OSX
Initialized /dev/rdisk2s4 as a 57 GB case-insensitive HFS Plus volume with a 8192k journal
Mounting disk
Finished partitioning on disk2s2 Untitled
/dev/disk2 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *63.9 GB    disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:       Microsoft Basic Data BOOT_ARMHF              999.4 KB   disk2s2
   3:       Microsoft Basic Data Linux                   1.9 GB     disk2s3
   4:                  Apple_HFS OSX                     61.6 GB    disk2s4