Komputerbay MACMEMORY 32GB (4x 8GB) PC3-10600 10666 1333MHz SODIMM 204-Pin Laptop Memory 9-9-9-24 for Apple Mac Komputerbay MACMEMORY 32GB (4x 8GB) PC3-10600 10666 1333MHz SODIMM 204-Pin Laptop Memory 9-9-9-24 for Apple Mac Certified Mac Memory Well Tested. Non-ECC Non parity Unbuffered Voltage 1.5V. Gold Leads. Supports Dual Channel &lt;p&gt;We test every module before it leaves the building, and back all of our purchases up with a LIFETIME WARRANTY!&lt;/p&gt; &lt;ul&gt; &lt;li&gt;PC3-10600 / PC3-10666 (1333MHz)&lt;/li&gt; &lt;li&gt; DDR3&lt;/li&gt; &lt;li&gt;Laptop memory upgrade&lt;/li&gt; &lt;li&gt;Non-ECC&lt;/li&gt; &lt;li&gt;Non-Parity&lt;/li&gt; &lt;li&gt;Unbuffered&lt;/li&gt; &lt;li&gt;Density: 32GB (4x 8GB SO-DIMM)&lt;/li&gt; &lt;li&gt;Timing: 9-9-9-24 (1333 MHz)&lt;/li&gt; &lt;li&gt;Speed: 1333MHz CL9&lt;/li&gt; &lt;li&gt;Pin Out: 204 Pin&lt;/li&gt; &lt;li&gt;Voltage: 1.5V&lt;/li&gt; &lt;li&gt;&lt;b&gt;&lt;font size="5"&gt;Lifetime Warranty&lt;/font&gt;&lt;/b&gt;&lt;/li&gt; &lt;/ul&gt; Limited Lifetime Scroll down to see compatible models. Please, make sure your Mac supports 8GB DDR3 1333MHz speed ram into one slot. Finding compatibility: On your Mac screen find and click Apple icon located in left hand side upper corner and chose " About this Mac ". Click " More info ". In the Contents section on the left side of the screen, click " Memory " See memory type and memory speed- MAKE SURE, YOURS IS DDR3, 1333MHz. Your Mac must support 8GB ram into one slot.