Click the Apple icon in the upper left corner, then About This Mac and then select the Storage tab. Ideally, your hard drive shouldn’t be more than 85 percent full. This is much less expensive and is an almost sure way to fix any charging and power issues your Mac may have! Here’re main reasons why you want to upgrade Wi-Fi to 802.11ac and Bluetooth to 4.0: You get Continuity, Handoff and new AirDrop working natively Wi-Fi 802.11ac is insanely fast, Bluetooth 4.0 is more reliable, secure and way quicker
Classic Mac Pro 5,1 (also 4,1 upgraded to 5,1) features only Wi-Fi 802.11n and Bluetooth 2.1.
