I have an Apple MacBook M1, since installing the Tahoe 26 update, the Terminal app performance is terrible. It lags, is slow, just pauses for a second whenever. Is there anyway to backout the Tahoe upgrade?
[Re-Titled by Moderator]
Original Title: Tahoe 26 Performance
MacBook Pro 15″, macOS 12.0
You must create a bootable USB installer of the OS you want, startup from that, erase the drive completely using Disk Utility, Reinstall macOS, then migrate you data from a backup made prior to the upgrade. If you don’t have a backup made prior to the upgrade, you will need to manually copy your data before erasing. In that case, Library-based data (Photos, Music, etc) might have been modified by the OS and won’t work with the older OS. You would need to export all of the media out of the Library, then import it into the old version. Metadata stored with the Library (Keywords, faces, tags, etc will be lost). Any files either edited or created since the upgrade must be backed up/restored manually.
Create a bootable installer for macOS - Apple Support
Erasing the drive completely on Apple Silicon might require a DFU reset which requires another Mac.
Most macOS upgrades alter the Mac firmware, so the firmware mismatch might cause problems.
I don’t spend a whole lot of time in Terminal, but it is generally open. I haven’t noticed any issues with it. Maybe there is more to your problem than just the OS.
Rather than going through all the hassle required to downgrade, you could give us more information so others can help you determine what is causing the issue.
Terminal being terribly slow is not something that we associate with Tahoe.
It is very likely that this problem is particular to your setup.
If we can determine the cause, you can get your mac to perform as you expect, and as it should.
To begin with: start your Mac in Safe Mode. Do you see the same problem while in Safe Mode?
Next: Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.
By looking at the report we may find what could be causing the issue.
SmithIT2000 wrote:
Guys, after about an hour and a half, it went back to normal speed. I think maybe the upgrade was doing some indexing or something still even though laptop was started.
Thanks for your help.
if in doubt about your Terminal>SettingsGeneral compare default shell
verify your software is up to date—
The current stable release of Tahoe including bug fixes, security updates is macOS 26.2
Keep your Mac up to date - Apple Support
Keep your Mac up to date - Apple Support
Guys, after about an hour and a half, it went back to normal speed. I think maybe the upgrade was doing some indexing or something still even though laptop was started.
Thanks for your help.
How to revert Tahoe 26 update for slow Terminal performance on my MacBook?
