Step 2: Turn it back on and immediately press and hold down the Option + Command + P + R keys all at the same time until you hear the startup sound. For ones with an Apple Silicone chip, it is reset automatically every time you reboot and the data is rebuilt on startup. Note: This only works on some MacBook Pros. Just follow the quick steps below to try it. If so, you may be in luck because a simple reset can often clear up this problem and it is very simple to do. If it has been corrupted, there is a chance it could cause your RAM issue.

Sometimes this area of memory can get corrupted. Non Volatile Random Access Memory ( NVRAM ) or Parameter Memory ( PRAM ) are locations in memory where your Mac stores settings and other important parameters so that it can access them quickly. Not all of them will be a problem with the chips themselves but could be a simple software issue. Now that you know the 3 beeps from your Mac detect a problem with your RAM and you know what RAM is, let’s look at some possible issues and their solutions. MacBook Pro Beeps 3 Times And won’t Turn On: Possible Issues & Solutions

The soldered-in variety has much less of a chance of coming loose but it is also much harder to upgrade or replace them if one or more of them fail. They may also be improperly seated during an upgrade or replacement. Removable RAM can sometimes come loose if the system is jarred. Many newer systems have their chips soldered into the logic board making it much harder to replace or upgrade them.

Macbook pro 3 beeps when starting