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[MNT]: Old macOS CI is failing to install

CI: testingCI configuration and testingCI configuration and testing

Maintenance

OS: Apple

Status: Open.

#32339 In matplotlib/matplotlib;

· QuLogic opened on Sep 11, 2026

Behavior of contains() inconsistent with fill in overlapping paths

topic: path handling

Status: Open.

#32329 In matplotlib/matplotlib;

· greglucas opened on Sep 10, 2026

[Bug]: macOS font discovery raises KeyError('_items') for an incomplete system_profiler font record

first-contribution

OS: Apple

status: needs clarificationIssues that need more information to resolve.Issues that need more information to resolve.

topic: text/fonts

Status: Open.

#32328 In matplotlib/matplotlib;

· iskandr opened on Sep 9, 2026

[Bug]: exception raised in SpanSelector callback puts the selector in an invalid state for later interactions

topic: widgets/UI

Status: Open.

#32327 In matplotlib/matplotlib;

· anntzer opened on Sep 9, 2026

[ENH]: Track PieContainer in Axes.containers

New feature

topic: axes

Status: Open.

#32320 In matplotlib/matplotlib;

· robertoffmoura opened on Sep 8, 2026

[Bug]: misaligned between xticklabel baselines

topic: text

Status: Open.

#32316 In matplotlib/matplotlib;

· anntzer opened on Sep 8, 2026

[Bug]: Modifying NumPy array after passing to set_xticks() unexpectedly alters plot ticks

topic: ticks axis labels

Status: Open.

#32313 In matplotlib/matplotlib;

· williamlus opened on Sep 7, 2026

[Bug]: Calling fig.add_artist(AnchoredText(...)) raises AttributeError during plt.show()

API: argument checkingValidation of acceptable argument valuesValidation of acceptable argument values

Status: Open.

#32312 In matplotlib/matplotlib;

· williamlus opened on Sep 7, 2026

[Bug]: boxplot errors when x and tick_labels are empty

topic: plotting methods

topic: ticks axis labels

Status: Open.

#32304 In matplotlib/matplotlib;

· carlosgmartin opened on Sep 5, 2026

[MNT]: Deprecate internal Cairo backends

backend: cairo

Maintenance

Status: Open.

Task

#32276 In matplotlib/matplotlib;

· QuLogic opened on Sep 1, 2026

[Bug]: Ragged Poly3DCollection projects uninitialized padding, causing nondeterministic overflow

first-contribution

topic: mplot3d

Status: Open.

#32272 In matplotlib/matplotlib;

· xjcl opened on Aug 31, 2026

tripcolor shading="gouraud" streaks/glitch on macOS arm64; shading="flat" is fine

backend: agg

first-contribution

OS: Apple

status: confirmed bug

Status: Open.

#32269 In matplotlib/matplotlib;

· matthew-a12 opened on Aug 31, 2026