![Quicken for mac air Quicken for mac air](/uploads/1/2/5/4/125444971/148969376.png)
But remember, the Air is doing this with half the power draw of the old Air, and one quarter that of the MacBook Pro. Blackmagic Disk Speed Test – Disk The Blackmagic Disk Speed Test is a handy tool for measuring the read and write speed of your disks.
One of the most common problems that can cause the gray screen issue is a bad peripheral or peripheral cable. When a bad peripheral is plugged into your Mac, it can prevent your Mac from continuing the startup sequence, and cause it to stall while it waits for the peripheral to respond to a command. The most common form of this is when a bad peripheral or its cable causes one of the signaling pins on one of Mac's ports to get stuck in one condition (set high, set low, or shorted out to ground or positive voltage). Any of these conditions can cause your Mac to freeze during the startup process. If your Mac starts back up without issue, then you'll know that it's a problem with a peripheral.
You will need to shut your Mac back down, reconnect one peripheral, and then restart your Mac. Continue this process of reconnecting one peripheral at a time and then restarting your Mac until you find the bad peripheral. Remember that the problem can also be a bad cable, so if you plug a peripheral back in and it causes the gray screen issue, try the peripheral with a new cable before you replace the peripheral.