# Glyph3 3.5 (3532) slow and lag

**URL:** <https://forum.glyphsapp.com/t/glyph3-3-5-3532-slow-and-lag/37315>\
**Category:** Glyphs\
**Tags:** bug\
**Created:** [September 21, 2026, 10:02am UTC](https://forum.glyphsapp.com/t/glyph3-3-5-3532-slow-and-lag/37315 "2026-09-21T10:02:17Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![MaloHff](https://forum.glyphsapp.com/letter_avatar_proxy/v4/letter/m/f14d63/32.png) [@MaloHff](https://forum.glyphsapp.com/u/MaloHff)\
**Post date:** [September 21, 2026, 10:02am UTC](https://forum.glyphsapp.com/t/glyph3-3-5-3532-slow-and-lag/37315/1 "2026-09-21T10:02:17Z")

</div>

Hello everyone, I have an issue with glyph 3,  
it’s been more than a week that, when opening any glyph file, it runs super slow and is lagging.

I tried following each steps of this: [Pannes | Glyphs](https://glyphsapp.com/fr/learn/crashes) ,  
sometimes it can be helpful on an temporary time, but the issue comes back every time my computer is turned off/on or if it goes sleep mode.

I’m currently using glyph 3.5 (3532) on a MacBook Air Sequoia 15.7.2 24go and I have a second screen DELL S2721QS.

Let me know if you have any idea what can be the possible issue !

---

<div class="post-metadata">

**Author:** ![GeorgSeifert](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/georgseifert/32/259_2.png) [@GeorgSeifert](https://forum.glyphsapp.com/u/GeorgSeifert)\
**Post date:** [September 22, 2026, 5:19pm UTC](https://forum.glyphsapp.com/t/glyph3-3-5-3532-slow-and-lag/37315/2 "2026-09-22T17:19:36Z")

</div>

Can you try to start without plugins. Hold down the Option + Shift key when you start Glyphs.

---

<div class="post-metadata">

**Author:** ![MaloHff](https://forum.glyphsapp.com/letter_avatar_proxy/v4/letter/m/f14d63/32.png) [@MaloHff](https://forum.glyphsapp.com/u/MaloHff)\
**Post date:** [September 23, 2026, 3:14pm UTC](https://forum.glyphsapp.com/t/glyph3-3-5-3532-slow-and-lag/37315/3 "2026-09-23T15:14:58Z")

</div>

I tried opening glyph like you said but it did not change anything,

Here you have the Diagnostic Info when doing so

> **Glyphs 3.5 (3532)**
>
> Mac OS 15.7.2 (arm64)  
> Python 3.11.9 (Glyphs)
> 
> (no custom plugins)
> 
> | Repository | Size | Ref |
> | --- | --- | --- |
> | TypofonderieIO | 5.7 Mo | `0fd7aff` |
> | Alex Slobzheninov | 541 ko | `6718aaf` |
> | Curve-Equalizer | 1.8 Mo | `186cac9` |
> | Typofonderie Scripts | 4.6 Mo | `9795910` |
> | fonttools | 56.6 Mo | `0fccde3` |
> | mekkablue | 9 Mo | `fdced38` |
> | vanilla | 5.2 Mo | `7ec2205` |
> | GlyphsPythonPlugin | 319.3 Mo | `0761617` |
> | robofab | 8.2 Mo | `5099fe0` |

---

<div class="post-metadata">

**Author:** ![GeorgSeifert](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/georgseifert/32/259_2.png) [@GeorgSeifert](https://forum.glyphsapp.com/u/GeorgSeifert)\
**Post date:** [September 23, 2026, 4:07pm UTC](https://forum.glyphsapp.com/t/glyph3-3-5-3532-slow-and-lag/37315/4 "2026-09-23T16:07:39Z")

</div>

Could you send me the .glyphs file. And a short screencast of the whole window showing the lag?