Bug: Unable to sign in after installing MacOS Big Sur Step 5: Your MacBook should now boot normally.
Step 4: Once you see the Apple logo appear and disappear three times, release the buttons. Step 3: Turn the machine on, and continue to hold down the keys mentioned above. Step 2: Hold down the Command + Option + P + R keys. Luckily, this issue is easily fixable following the instructions below to reset your Mac’s PRAM. Additionally, some users are receiving a message with a battery service warning. Some users have reported that after installing MacOS Big Sur, their MacBook or MacBook Pro’s battery life has become dramatically shortened. Issue: MacOS Big Sur drains the battery fast or displays battery issues Step 6: Now attempt to install MacOS Big Sur. Step 5: Once complete, typing tmutil listlocalsnapshots / and pressing Enter will not display any Time Machine snapshots. Step 4: Repeat the above command to delete all snapshots. Ex: sudo tmutil deletelocalsnapshots -002051 Step 3: To delete each snapshot, type sudo tmutil deletelocalsnaps, then the name of the snapshot. Step 2: Type tmutil listlocalsnapshots / and press Enter to show all the snapshots on your machine the snapshots will appear as files starting with the word “com.” Step 1: Open the Terminal app on your Mac.
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Follow the steps below to remove your Time Machine backups and then install Mac OS Bir Sur.
You can temporarily clear out these Time Machine snapshots to solve the issue. Time Machine stores snapshots of your drive to assist with its next backup. If you have at least 50 GB of free space on your machine and Mac OS Big Sur still complains there isn’t enough space, Time Machine is likely the culprit.
Otherwise, check that your device has enough free storage space on the main hard drive or solid-state drive to install the new OS properly - you will need 50GB of free space to proceed with the install. If you’re having problems installing MacOS Big Sur on your Mac, first ensure that you have a compatible machine (listed below). Problem: MacOS Big Sur won’t install on your machine
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