The spelling of the word "mackley" can be explained using IPA (International Phonetic Alphabet) phonetic transcription. The first sound is represented by /m/, followed by the short vowel sound /æ/. The next two sounds are a voiceless velar stop represented by /k/ and a voiced lateral consonant represented by /l/. The final sound is a long "e" sound, represented by /i/. Therefore, the correct spelling for the word "mackley" is m-a-c-k-l-e-y.